How does a frame of reference change the way you accurately describe the motion of an object?

Answers

Answer 1
If a person were standing on the sidewalk, how fast would she say the apples are moving?
Since she will see them exactly the same way as me (we're both in the same reference frame), she will say 15m/s.
Now the truck starts to move forwards at 20m/s. I am still throwing apples forwards, exactly the same as I was throwing them before, at 15m/s.
If I am really not paying attention to what’s going on around me (like the fact that I am standing in the back of a moving truck), how fast would I say the apples are moving?
Still 15m/s! Relative to me, I can only make an apple move away from me at 15m/s, so that’s how fast I measure the apple moving away from me.
How fast does my friend on the sidewalk say the apple is moving?
Well, even before I throw it, she’ll say that the apple is moving at 20m/s (the speed of everything on the truck).
When I have thrown the apple forward, adding more velocity to it, she will say it is going at (20m/s + 15m/s) 35m/s!
Now I turn around and start throwing the apples from the rear of the truck, backwards!
I will still say that my apples are moving at 15m/s, because from my way of looking at it, that’s how fast the apple is moving. The only thing I might say that is different is that it is -15m/s, since even I should be able to notice they are going in the opposite direction now.
My friend on the sidewalk will say that the apple is moving at (20m/s + -15m/s) 5m/s!
Answer 2
Your frame of reference helps to to describe the velocity of the object, rather than simply the speed, and the displacement of an object rather than its distance. Velocity and displacement are "vector quantities" meaning they provide a value, such as speed or distance, relative to a reference point.

Velocity is not only the measure of speed, but also direction. The same is true of displacement with regard to distance, it not only describes how far an object has traveled, but also the direction in which it traveled relative to a reference point. 

Related Questions

what are ten derived quantities

Answers

volume area density force accleration pressure speed pontentail diffrence

If the labor force of 155 million people is growing by 1.2 percent per year, how many new jobs have to be created each month to keep unemployment from increasing?

Answers

Answer:0.155 million jobs have to be created each month to keep unemployment from increasing.

Explanation:

Population of the labor force = 155 million

Percentage increase of labor force in an year = 1.2 % of 155 million

Percentage increase in labor force in a month = [tex]\frac{1.2 \%}{12}=0.1 \%[/tex] of 155 million

Jobs required to be created each month = population increase each month

[tex]=155 million\times \frac{0.1}{100}=0.155 million[/tex]

0.155 million jobs have to be created each month to keep unemployment from increasing.

Final answer:

To maintain the current unemployment rate with a labor force of 155 million growing at 1.2% annually, 155,000 new jobs need to be created each month.

Explanation:

To determine how many new jobs have to be created each month to keep unemployment from increasing, given a labor force of 155 million people growing at 1.2 percent per year, first, calculate the annual growth of the labor force. Multiply the current labor force by the growth rate:

155 million * 0.012 = 1.86 million new entrants into the labor force per year.

To find the monthly job creation requirement, divide this annual number by 12:

1.86 million / 12 = 155,000 jobs per month.

Therefore, 155,000 new jobs need to be created each month to keep unemployment from increasing as the labor force grows.

Inertia increases as an object's _________ increases. mass volume acceleration velocity

Answers

The answer is mass. Inertia is increased when mass increases.
Inertia increases as an object's mass increases. 

Most earthquakes occur in areas close to where tectonic plates meet. There are earthquakes in San Francisco. What can be concluded from this information?

A) San Francisco is far away from an area where tectonic plates meet.
B) San Francisco is close to an area where tectonic plates meet.
C) San Francisco is close to Luzon, an island in the Philippines.
D) San Francisco is likely to experience a volcanic eruption in the near future.

Answers

B. To have an earthquake there must be a fault line (where two or more tectonic plates meet) so if San Fran. has earthquakes they’re on a fault line.

Answer:

B) San Francisco is close to an area where tectonic plates meet.

Explanation:

According to the question most earthquakes occur in areas close to where tectonic plates meet. The best option that can be concluded from the earthquakes occurring in Francisco is that San Francisco is close to an area where tectonic plates meet. The close proximity of San Francisco to where tectonic plates meets will likely cause earthquake in that region.

Generally, the earth is divided into different plates. These tectonic plates might be oceanic crust or continental crust. The plates are constantly moving. The plates might be moving away from each other(divergence) , colliding with each other(convergence) or moving past each other (transform).

The area where these plates meets are usually area of potential earthquakes. This boundary are area of minor or major earth quake. Usually , aesthenospheric material are introduce to the surface through this boundary.  

Choose one of the six fitness related components that are used in gymnastics.

Agility
Speed
Reaction Time
Balance
Coordination
Power

Answers

Balance would be the answer to this questions

Select answer about motion and newtons law and explain why it's correct 23POINTS NEED ASAP

Answers

The train would need the greatest amount of force due to weight! If you think of it, a baseball won't need much force to stop it, but if you have a heavy train, it will need excessive force to stop the train. The answer would be #3


I hope this answer helps!

Sorry if it doesn't make sense, as I don't know that much about physics! I am just thinking of what makes sense.

How can the rate of a reaction be increased?


lowering the temperature


decreasing the amount of reactants


having more surface area


diluting a solution

Answers

Answer:

C. Having more surface area

When the reaction involves solids, an increased surface area of it will result in an increased reaction rate. The higher the temperature, the faster the reaction rate will be too. Lowering the temperature, decreasing the amount of reactions, and diluting a solution will decrease the reaction rate

Answer:

having more surface area

Explanation:

why is the mass of an atom’s electrons not included in the atom’s mass number

Answers

The electron is so light and so little mass that it basically adds nothing to the mass so the scientists decided not to include it

How would you measure the volume of a sponge

Answers

length* width*height =volume always
The same old volume equation

Length x breadth x height = Volume

In the past, the intensity of the Earth's magnetic field was _____. A. greater B. weaker C. same D. evidence is inconclusive?

Answers

I'd say a because it says it's magnetic field as decreased by 10% in the last century

I'm sure A is the right answer

Why is it nessesary to have an independent variable that is changed by the experimenter during an experiment

Answers

It's important to have a independent variable because if ever thing was the same you will get the same result. Plus you don't want to have same results because it's a experiment . Also you will need a independent variable to do a experiment .

The mass of a substance was found to be 8.2 g. By using the water displacement method the volume was found to be 3.6 cm3. Calculate the density

Answers

D= M/V

D=8.2/3.6

D= 2.3g/ml

Answer:

D= 2.3g/ml

Explanation:

Which is larger than a single atom?

a. magnetic domain

b. electron

c. neutron cloud

d. proton

Answers

I think electron is the largest but I’m not 100% sure

Answer:

c

Explanation:

a hollow tennis ball and a lead filled tennis ball are dropped off a tall building. which reaches the ground first, the hollow ball, or the lead filled ball

Answers

Lead filled ball because it is less affected by air resistance

6. Velocity is a ____________. a) vector b) value c) arrow d) none of these

Answers

the speed of something in a given direction.   so i think none of these
a) vector because a vector is giving the magnitude or you could kind of view as a size with a direction.

Based on the periodic table above, which of the following elements is a metal?

Answers

The answer is lithium

Answer:

k

Explanation:

k

a high school student ran the 100 meter dash in 12.20 seconds. find the velocity in meters per second and kilometers per hour.

Answers

v= 100 m/12,2s
v≈ 8,2 m/s = 29,52 km/h

Does A= 6.4 B=12 C=12.2 Form a RIGHT TRIANLGE?

Answers

to answer this question, you must remember the equation:

a²+b²= c²

(6.4)² + (12)²=   (12.2)²

40.96 + 144 = 184.96
 (12.2)² = 148.84

184.96 ≠ 148.84

This cannot be a triangle

hope this helps

4. A person can swim 0.65 m/s in still water. She heads directly south across a river 130 m wide and lands at a point 88 m [W] downstream. K/U T/I A (a) Determine the velocity of the water relative to the ground. (b) Determine the swimmer’s velocity relative to Earth. (c) Determine the direction she should swim to land at a point directly south of the starting point.

Answers

velocity 0.65m/s in still water, directly south

time to cross the river = 130/0.65 = 200s = t
during that time, there is a current (c) ,directly west

c*t = 88
c = 88/200
c = 0.44 m/s .........ans
++++++++++++++++++

Answer:

speed of the person in still water = 0.65 m/s

width of the river = 130 m

distance covered downstream = 88 m

a) let the speed of the water be  = s

The time to cover two displacements would be equal.

[tex] \frac{130m}{0.65m/s}=\frac{88m}{s}\\ \Rightarrow s = 0.44 m/s[/tex]

b) Swimmer's velocity  relative to earth would be:

[tex] v = \sqrt{0.65^2+0.44^2} = 0.78 m/s[/tex]

c) The swimmer should swim south of East to land at a point directly south of the starting point.

Complete this sentence. If mass remains the same while the volume of a substance ________, the density of the substance will_______________. decreases, decrease increases, decrease increases, stay the same decreases, stay the same

Answers

If mass remains the same while the volume increases, the density of the substance will decrease.
If mass remains the same while the volume decreases, the density of the substance will increase.

Answer:

increases, decrease

Explanation:

The density of a body is the measure of mass concentration of a material. It is an intrinsic property which is constant. It is the ratio of mass and volume

m = Mass

v = Volume

Density

[tex]\rho=\frac{m}{v}[/tex]

This means that density is inversely proportional to volume.

So, if volume increases density will decrease.

how is a pure substance different from a mixture? A. mixtures can be separated by physical means B. Pure substances are made up of mixtures C. A pure substance is heterogeneous D. A mixture is made of one substance

Answers

well, a pure substance Is something that isn't mixed with anything else. it is it's own thing, and a mixture can be separated by physical means, so it is A.

Mixtures can be separated by physical means is the statement that describes how a pure substance different from a mixture.

A pure substance is a form of matter that has a definite (constant) composition and distinctive properties.

On the other hand, a mixture is a combination of two or more substances in which they retain their properties.

Any mixture can be formed and then separated by physical means into its pure components without changing the identity of those components.

That is, there are different methods to separate a mixture into its different components, these methods are physical since they do not alter the properties of the components.

These physical methods are: Filtration, decantation, distillation among others, and are based on the physical state, characteristics and properties of the components of the mixture, to use the most appropriate technique.

Therefore, we can conclude that mixtures can be separated by physical means is the statement that describes how a pure substance different from a mixture.

Learn more here: https://brainly.com/question/772980

the theory that all matter consists of constantly moving particles is known as the
a. physical theory of matter
b. attraction theory of matter
c. theory of states of matter
d. kinetic theory of matter

Answers

It would be the D. kinetic theory of matter. Whenever you see kinetic, you can know that it has something to do with motion.

If I spacecraft seems to be Motionless in deep space is given some type of quick push what will happen

Answers

It will stay in motion unless an outside force slows it down.

Answer:

Will remain in motion until an external force is applied.      

Explanation:

According to Newton's first law of motion, a body continues to be in state of rest or motion, until and unless an unbalanced, external force acts on it.

In deep space, there is no external force. If a motionless spacecraft uses thrusters to give a push, the spacecraft will continue to be in motion until an unbalance external force acts on it again to stop it or increase its speed or change direction.

Will give BRAINLIEST!
A limestone plateau has no surface water. All the water is pulled underground through cracks and crevices in the surface. What most likely will cause the underground of the plateau to change over time?

Physical weathering due to frost wedging
Physical weathering due to abrasion
Chemical weathering due to oxygen
Chemical weathering due to water

Answers

A limestone plateau has no surface water. All the water is pulled underground through cracks and crevices in the surface. What most likely will cause the underground of the plateau to change over time?

Physical weathering due to frost wedging


Physical weathering due to abrasion


Chemical weathering due to oxygen


Chemical weathering due to water  Correct Answer

Answer: Chemical weathering due to water. fyi i did the test.

Mass= 386g volume= 20cm3 what is the density=

Answers

D=m/v
386/20=19.3
The density is 19.3 g/cm^3
The density is 19.3 g/cm3

Sound waves that start in air can move into water. This is because it is __________ that is transferred and not .
a.waves, matter
b.energy, waves
c.energy, particles
d.particles, energy

Answers

The correct answer is B

Answer:

the answer is c I got right on USA test prep

a croquet ball, after being hit by a mallet,slows down and stops. do the velocity and acceleration of the ball have the same signs

Answers

It depends. While slowing down acceleration will have negative sign but the velocity depends upon the initial point sonce velocity is a vector quantity if it is going back towards the initial position it will reduce but if it passes the initial position and goes back it will have negative sign....so it totally depends upon the situation.

The smallest part of an element that can still be identified as that element is a(n) _____.

Answers

it’s an Atom so this is the answer

The main offenders in terms of greenhouse gas emissions

Answers

Green house gas Emission output changes are a result of business growth and the concerted action to become lass carbon intensive. NEWYORK-Global green house gas emissions are growing and chinese oil and gas companies are some of the top offenders. PETROLOEA BRASILEIRO S.A.BRAZIL - This is a controlled oil company and it has emitted 73.4 million metric tons of co2 equalent in 2013. ELECTRIC DE FRANCE - This is an integrated energy company that generates electricitythrough hydro,wind,solar,biomass and other fossil fuels. POSCO SOUTHKOREA -It is a multinational steel making company that emitted 88.1 million metric tons of co2 equivalent in 2013. The southern company,Nippon steel &sumitomo metal corp in japan ,American electric power co .EXXON MOBIL CORP are also the main offenders in green house gas emissions.

Someone help I’m dumb

Answers

Interact: Meet
Indicate: Show

Answer:

Meet and show

Explanation:

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