A constant force of 5.00 N acts on a 2.50 kg object for 10.0 s. The changes in the object’s momentum is 50 kg-m/sec and velocity 20 m/sec.
What is force?
A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
The acceleration of body,
a = 5/2.5
a = 2 m/sec²
change in velocity,
v - u = at = 2.10
change in velocity = 20 m/sec
change in momentum = 20. (2.50)
= 50 kg-m/sec.
A constant force of 5.00 N acts on a 2.50 kg object for 10.0 s. The changes in the object’s momentum is 50 kg-m/sec and velocity 20 m/sec.
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The change in the object's momentum is 50.0 kg·m/s, and the change in the object's velocity is 20.0 m/s.
To find the change in the object's momentum, we use the impulse-momentum theorem, which states that the impulse applied to an object is equal to the change in its momentum. Impulse is defined as the product of the force and the time interval over which the force is applied. Mathematically, this is expressed as:
[tex]\[ \text{Impulse} = \text{Force} \times \text{Time} \][/tex]
Given that the force (F) is 5.00 N and the time (t) is 10.0 s, we can calculate the impulse (I):
[tex]\[ I = F \times t = 5.00 \, \text{N} \times 10.0 \, \text{s} = 50.0 \, \text{N\·s} \][/tex]
Since 1 N = 1 kg·m/s², the impulse can also be written as:
[tex]\[ I = 50.0 \, \text{kg\·m/s}^2 \cdot \text{s} = 50.0 \, \text{kg\·m/s} \][/tex]
This impulse is the change in the object's momentum [tex][ \Delta p][/tex], so:
[tex]\[ \Delta p = I = 50.0 \, \text{kg\·m/s} \][/tex]
To find the change in the object's velocity [tex][ \Delta v][/tex], we use the definition of momentum (p), which is the product of mass (m) and velocity (v):
[tex]\[ p = m \times v \][/tex]
The change in momentum can also be expressed as:
[tex]\[ \Delta p = m \times \Delta v \][/tex]
We can solve for [tex][ \Delta v][/tex] by rearranging the equation:
[tex]\[ \Delta v = \frac{\Delta p}{m} \][/tex]
Given that the mass (m) of the object is 2.50 kg, we can calculate the change in velocity:
[tex]\[ \Delta v = \frac{50.0 \, \text{kg\·m/s}}{2.50 \, \text{kg}} = 20.0 \, \text{m/s} \][/tex]
Therefore, the change in the object's velocity is 20.0 m/s.
Directions Part 2: Using what you learned about the formation of the Grand Canyon and which layer is oldest, try to answer the following mystery using the same principles.
Help
Background: Ms. Smith was expecting to get her new iPad in the mail when she got home from work. She had been telling everyone how excited she was to get the newest version. Shockingly, someone broke into her mailbox and stole it. She talked to all the people who had been at her house that day and each said they had not seen anything and that the mailbox was in good condition when they left. She determined that the last person to leave her house was likely the culprit. The diagram below shows the “footprints” left in front of the mailbox. Who was it?
Clues:
The Neighbor walks to work
The Handyman rides a bike
The Cook rides a motorcycle
The Maid drives a car
The Nephew has a dog
Answer: Neighbour
Explanation: Taken perspective from the given clues:
The Neighbor walks to work
The Handyman rides a bike
The Cook rides a motorcycle
The Maid drives a car
The Nephew has a dog
If we assume that the handyman delivered the iPad in the mailbox, then
The direction of the cook, Nephew and his dog are perpendicular to the direction of the bike of the handyman. So, it can't be the cook, Nephew and the maid.
The two suspects are the handyman and the neighbour.
If the handyman actually dropped the iPad and left, then, the neighbour should be the culprit.
The energy carried by a wave is dependent upon its wavelength, frequency, and amplitude. So long as speed is constant, the energy of a wave will increase as a result of an increase in which of these characteristics?
The energy of a wave will increase with an increase in amplitude when the wave's speed is held constant. The amplitude of a wave is directly proportional to the energy it carries.
Explanation:
The energy of a wave is influenced by various factors such as its amplitude, frequency, wavelength, and speed. The question specifically focuses on how the energy will change, assuming speed is constant. Given a constant wave speed, it is the amplitude of the wave that, when increased, will result in an increase in the wave's energy. The amplitude is directly proportional to the energy carried by a wave – the greater the amplitude, the more energy the wave carries.
For mechanical waves, the energy transferred is proportional to both the square of the wave's amplitude and the square of its frequency. This means that if the frequency of the wave is doubled, the energy increases by a factor of four, assuming the amplitude remains the same. However, if the speed is kept constant, the energy increase resulting from an increase in frequency must be exchanged with a decrease in wavelength due to their inverse relationship. The essential point to remember is that, with speed being constant, increasing the amplitude of a wave will directly lead to an increase in its energy.
A. The boat uses a heat engine to move. This is a simple schematic of how a heat engine operates. Describe what this schematic is showing in terms of the laws of thermodynamics. (6 points)
Answer: The internal heat energy of the boat heat engine, metamorphoses into mechanical workdone that causes the boat to move.
Explanation: First law of thermodynamics tells us that energy cannot be created nor destroyed, it can only be transformed from one form to another.
The internal heat energy of the boat heat engine, metamorphoses into mechanical workdone that causes the boat to move.
According to the second law of thermodynamics which state that when energy changes from one form to another form, or matter moves freely, entropy (disorder) in a closed system increases. Differences in temperature, pressure, and density tend to even out horizontally after a while
What do you think swarming locusts affect planted crops?
Answer:
they say yum yum as they eat planets and make humans starve
Explanation:
but they still eat them
Answer:
Large swarms of locusts can completely strip the foliage and stems of plants such as forbs and grasses. ... They often eat dry plant matter on the ground and will forage for weak or dead grasshoppers when plant food is scarce. As nymphs have a large appetite, they cause more damage than adults.
Explanation:
Need help now due in 5 minutes
Answer:
I'm positive it's the last one
Explanation:
3. A pendulum with a 1.0-kg weight is set in motion from a position 0.04 m above the lowest point on the path of the weight.
What is the kinetic energy of the pendulum at the lowest point?
(Hint: Assume there is no friction.)
Answer: K.E = 0.4 J
Explanation:
Given that:
M = 1.0 kg
h = 0.04 m
K.E = ?
According to conservative of energy
K.E = P.E
K.E = mgh
K.E = 1 × 9.81 × 0.04
K.E = 0.3924 Joule
The kinetic energy of the pendulum at the lowest point is 0.39 Joule
Final answer:
The kinetic energy of the pendulum at the lowest point is 0.392 J, which is found by converting the initial gravitational potential energy into kinetic energy using the principle of conservation of energy.
Explanation:
To determine the kinetic energy of the pendulum at the lowest point, we use the principle of conservation of energy, which states that the total mechanical energy in a system remains constant if there is no friction.
We know that the pendulum starts with gravitational potential energy which is completely converted into kinetic energy at the lowest point. The potential energy (PE) at the starting point is due to its height above the lowest point and is calculated as PE = mgh where m is the mass, h is the height, while g is the acceleration brought on by gravity (9.8 m/s²).
Let's calculate the potential energy at the initial height:
PE = mgh
= (1.0 kg)(9.8 m/s²)(0.04 m)
= 0.392 J
Since there is no friction, this potential energy will be entirely converted into kinetic energy (KE) at the lowest point. Therefore, the kinetic energy at the lowest point is also 0.392 J.
What do you want to learn about simple machines? (could someone come up with a question about simple machines for me)
Answer:
what are simple machines lol
Explanation:
The direction of the magnetic field produced by an electric current will change when the direction of the ______ changes.
Answer:
Current
Explanation:
Your welcome
Answer:
Current
Explanation:
A car has a force of 2000N and a mass of
1000kg. What is the acceleration of the
car?
Answer:
2 m/s
Explanation:
The acceleration of the car is 2 m/s².
What is acceleration?
Acceleration is rate of change of velocity with time. Due to having both direction and magnitude, it is a vector quantity. Si unit of acceleration is meter/second² (m/s²).
Given parameters:
Force acting on the car; F = 2000N.
Mass of the car; M = 1000 kg.
From Newton's second law of motion, we know that:
Force = mass× acceleration.
⇒ acceleration = Force/mass = 2000/1000 m/s² = 2 m/s².
Hence, the acceleration of the car is 2 m/s².
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Using the text and the lab results, can you identify the TRUE statements?
The instantaneous speed of the car at 40 cm was about 2cm/sec.
The speed of the car increased during the 100 cm trip.
The straight line in the graph indicates that the speed during the trip was constant.
Every two seconds the wind-up car moved about 20 cm.
The data tells us that it takes the wind-up car about 50 seconds to travel 100 cm.
Without the actual text and lab results, it's not possible to definitively confirm these statements. They involve concepts of physics including instantaneous speed, acceleration, constant speed, and average speed. Understanding these terms can aid in evaluating the claims.
Explanation:In the absence of the actual text and lab results, it's impossible to definitively evaluate the truth of these statements. However, here's a general understanding of what each would mean:
The instantaneous speed of the car at 40 cm was about 2 cm/sec. - This means at the very moment when the car had traveled 40 cm, it was moving at a rate of 2 cm every second.
The data tells us that it takes the wind-up car about 50 seconds to travel 100 cm. - This implies an average speed of 2 cm/sec.
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A student fires a cannonball diagonally at an angle of 71° with an initial speed of 31m/s. Neglect drag and the initial height of the cannonball.
What was the cannonball's initial horizontal speed?
What was the cannonball's initial vertical speed?
How long did the cannonball rise?
What was the cannonball's total flight time?
What was the cannonball's maximum height?
How far from the cannon did the cannonball land (measured along the ground)?
Answer:
vx = 10.09 m/s
vy = 29.31 m/s
t = 5.98 s
ymax = 43.83 m
xmax = 60.37 m
Explanation:
A) The horizontal speed is constant in the complete trajectory. It is given by:
[tex]v_x=v_ocos\theta\\\\v_x=(31m/s)(cos71\°)=10.09\frac{m}{s}[/tex]
B) The vertical initial speed is:
[tex]v_y=v_osin\theta\\\\v_y=(31m/s)(sin71\°)=29.31\frac{m}{s}[/tex]
C) The flight time is given by:
[tex]t=\frac{2v_osin\theta}{g}\\\\t=\frac{2(31m/s)(sin71\°)}{9.8m/s^2}=5.98s[/tex]
D) The maximum height is:
[tex]y_{max}=\frac{v_o^2sin^2\theta}{2g}\\\\y_{max}=\frac{(31m/s)^2(sin71\°)^2}{2(9.8m/s)}=43.83m[/tex]
E) The maximum horizontal distance is:
[tex]x_{max}=\frac{v_o^2sin2\theta}{g}\\\\x_{max}=\frac{(31m/s)^2sin(2*71\°)}{9.8m/s^2}=60.37m[/tex]
Provides detailed calculations for the initial horizontal and vertical speed of a cannonball fired at an angle, its rise time, flight time, maximum height, and horizontal distance traveled.
The initial horizontal speed of the cannonball: 31m/s × cos(71°) = 10.089m/s
The initial vertical speed of the cannonball: 31m/s × sin(71°) = 29.387m/s
The time the cannonball rises: vy = uy + at, so t = (29.387m/s) / g ≈ 3 seconds
The total flight time of the cannonball: Twice the time it takes to rise ≈ 6 seconds
The maximum height of the cannonball: Using the kinematic equation h = uy² / (2g), h ≈ 44.877m
The distance from the cannon to where the cannonball lands: Horizontal distance = vx × total flight time = (10.089m/s) × 6s ≈ 60.534m
Write a reflection about what you learned and how you can reduce your carbon footprint (ecological footprint)
Answer:
You could say that you learned that humans effect the ecosystem and many big ways. You can reduce ur footprint by recycling, riding bikes instead of cars, and eating more fruits and vegetables
Explanation:
Newton's "quantity of motion" is conservation.
True
False
In metal wires the charged particles that move are A. protons B. electrons C. neutrons D. none of the above
Answer:
the answer is B: electrons
Explanation:
Answer:
c
Explanation:
What would happen to the speed of sound wave if it moved from ocean water to air
Answer:
The speed of sound in water increases with increasing water temperature, increasing salinity and increasing pressure (depth). The approximate change in the speed of sound with a change in each property is: Temperature 1°C = 4.0 m/s.
Explanation:
Answer:
It would slow down.
Explanation:
Right on Edge!
Which phrases describe all the outer planets motion? Select two options
no rotation
fast rotation
LAH
slow revolution
opposite revolution
Որ էլ էի <ԵՐ ԵՆ
ՍԻՈ
Answer:
slow revolution and fast rotation
Explanation:
How far does an object move if a 20 N force is applied to it doing 40 J of work?
Answer: The object moved 2 metres away
Explanation:
Given that the
Force applied F = 20 N
Work done W = 40 J
From the definition of workdone which state that: product of force and distance
W.D = F × S
Where S = distance
S = W.D/F
S = 40/20 = 2 metres
The object moved 2 metres away.
1.What is the contour interval of this map?
Answer:
The contour interval of the map is 50
A student is writing a paper on her laptop while sitting on her couch. After some time the student feels her computer getting warm. Which of the following is most likely the explanation for this observation
The warmth felt by the student from her laptop most likely results from the heat generated by the computer's internal components. This is a common occurrence exacerbated by potentially blocked cooling vents when the laptop is used on a soft surface like a couch.
Explanation:When the student feels her laptop getting warm, it is most likely due to the heat generated by the computer's components as they work. Computers convert electrical energy into computational power, and during this process, some energy is lost as heat. This is a typical thermal phenomenon where the electronic components, like the CPU and GPU, produce heat as a byproduct of their operation. As more processes run on the laptop or the more intensive the tasks, the more heat is generated. This heat is usually dissipated by cooling mechanisms such as fans or heat sinks. However, when using a laptop on a soft surface like a couch, its cooling vents might be obstructed, which can cause the system to become warmer than it would on a hard, flat surface.
The scientific method might be applied to this observation by proposing hypotheses and conducting experiments. For example, a hypothesis could be, 'The laptop is warm because its cooling vents are blocked while sitting on the couch.' A relevant prediction in line with the hypothesis could be, 'If the laptop is placed on a flat, hard surface where its vents are unobstructed, then it will cool down and be less warm to the touch.' Testing such a prediction by observation and experimentation gives insight into the causes of thermal phenomena.
A box contains about 5.64 x 1021 hydrogen
atoms at room temperature 21°C.
Find the thermal energy of these atoms.
Answer in units of J.
Answer:
Explanation:
Given that,
The temperature of atom is 21°C
θ = 21 + 273 = 294K.
Then, from kinetic theory,
The kinetic energy of individual elements is
K.E = 2kT/3
k is Boltzmann constant
k = 1.38 × 10^-23 J/K•particle
Then,
K.E = 2 × 1.38 × 10^-23 × 294 / 3
K.E = 2.7048 × 10^-21 J/particle
Each particle of hydrogen is 5.64 × 10²¹ particle
Total K.E = 2.7048 × 10^-21 × 5.64 × 10²¹
Total K.E = 15.26 J
Use the drop-down menus to complete the statements. are pure substances that cannot be broken down into a simpler form. are units of two or more atoms. are the smallest possible particles of an element. are pure substances made of two or more atoms of different elements.
Answer: Please see below
Explanation:
Are pure substances that cannot be broken down into a simpler form---- Element
are units of two or more atoms---- Molecule
are the smallest possible particles of an element---- an Atom
are pure substances made of two or more atoms of different elements---- Compound
An atom is the smallest unit of matter that consists of protons, neutrons and electrons. Eg the element, helium, contains atoms with two protons in the nucleus.
Eg of element, we have carbon, hydrogen, helium
Eg of a compound--- Ammonia
Eg of a molecule-----H2O (water),C6H12O6 (glucose)
Explanation:
An element is made up of
(One type of atom)
Ahmed saw all of these things as he walked to school this morning. Which one is an example of a force pushing downward toward the ground?
A. A bird sat on a telephone wire.
B. A woman moved her child from one place to another in a wagon.
C. A man pulled weeds in his garden
D. A dog tugged on a rope a child held
___ discharge occurs when oppositely charged objects get close enough for the air between them to become electrically charged.
Answer:
Static discharge
Explanation:
Static discharge occurs when oppositely charged objects get close enough for the air between them to become electrically charged causing electrons to flow between the oppositely charged objects leading to spark. The flow of the electron is from one charged body to another charged body is what causes the static discharge.
Charges can be built through friction, this buildup of electric charges is known as static electricity.
Electrical discharge occurs when the electric field between oppositely charged objects exceeds about 3 * 10⁶ V/m, ionizing the air and enabling a current to flow in the form of sparks or corona discharge.
The phenomenon being described is known as electrical discharge, which occurs when oppositely charged objects are brought close enough together for the air between them to become electrically conductive. When the electric field between these objects exceeds a certain threshold - about 3 * 10⁶ V/m for air - the air molecules become ionized. This leads to the flow of current and discharge in the form of sparks, like lightning, or a more gradual event known as corona discharge.
When this happens, if air was ohmic, the current would increase steadily as the voltage difference increased. However, gases are generally nonohmic, so there is zero current until the voltage reaches a point where the electrical forces tear electrons away from air molecules. Subsequently, these free electrons and positive ions create a cascade that ionizes more air molecules, resulting in an impressive electrical discharge.
An object gains a negative charge by accumulating electrons, while losing electrons makes it positively charged. In nature, we see this during thunderstorms, where the friction between water and air particles in thunderclouds creates huge charges. The sudden release of these accumulated charges towards the ground is what we witness as a dangerous lightning strike.
It takes 300 N to move a box 10 meters in 10 seconds. How much power is
required?
O A. 100 W
O B. 3,000 J
C. 30,000 W
O D. 300 W
Answer:
I do t really know what's the answer but try it your self not uo but rude
Which statement uses the terms velocity and acceleration correctly?
A. Acceleration is the rate of change of velocity.
B. An object with a constant velocity cannot accelerate.
C. Acceleration is always in a straight line.
D. Acceleration is an increase in velocity.
E. Acceleration happens only in the same direction as the object is moving.
Option A: Acceleration is the rate of change of velocity.
Explanation:The statement that uses the terms velocity and acceleration correctly is option A: Acceleration is the rate of change of velocity. Acceleration is defined as the change in velocity over time, so it represents how quickly the velocity is changing. Option B is incorrect because even though an object with constant velocity has no change in speed, it can still accelerate if it changes its direction. Option C is also incorrect because acceleration can occur in any direction. Option D is incorrect because acceleration can be a decrease in velocity as well. Option E is incorrect because acceleration can happen in any direction.
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A force that pushes or pulls is known as
O A.
an expected force.
B.
a reaction force.
OC.
an applied force.
a positive force.
Answer:
C
Explanation:
An applied force is a force that is applied to an object by a person or another object. If a person is pushing a desk across the room, then there is an applied force acting upon the object. The applied force is the force exerted on the desk by the person.
Answer:
C:
Explanation:
any force acting on an object is a positive force I believe.
Which tectonic plate boundary caused the structure that is circled in the image?
Answer:
Crust
Explanation:
PLEASE HELPPP!!! D:
A 62 kg person jumps from a window to a fire net 20.0 m directly below, which stretches the net 1.4 m. Assume that the net behaves like a simple spring. (a) Calculate how much it would stretch if the same person was lying on it. (b) How much would it stretch if the person jumped from 38 m?
a)___
b)___
Answer:
a is 4.6 x 10-2m
b is 1x8204m
Explanation:
The fire net is actually going past zero into a negative vertical displacement. Essentially because again, we're saying that why initial equals thirty eight meters. The person is falling down to zero meters. Zero meters is where the fire that is. And then after the person stretches the fire. Yet it has a certain vertical displacement. But this particles placement is negative. So here we're going to choose the negative value. so trying to see how much of the fire net would stretch if the person was lying on tough it and if the person jumped from a height of thirty eight meters. So for here Mass is going to be equal to sixty two kilograms and why initial for party is going to be twenty meters and then why final is going to be negative one point four meters And so in order to find in order to find this is an instance, essentially, this is an instance perspective in the sense that we need this data in order to figure out this during constant so we can see that energy initial equals energy final and then we consider it mg y initial equals mg.
Mirrors reflect light and lenses absorb light.
True
False
The earliest ideas of charge were the result of experiments by:
Benjamin Franklin
William Gilbert
Charles Coulomb
Isaac Newton
Answer:
The earliest ideas of charge were result of experiments by William Gilbert
Answer:
William Gilbert