Physics Middle School

determine the mechanical energy of this object: 1-kg ball rolls on the ground at 2 m/s

A. The ball is on the ground, so the mechanical energy is zero
B. 2 J
C. 1 J
D. 4 J

Answers

Answer 1
The potential energy would be zero. Only kinetic energy is present in this case. To find out what the answer is we do the equation: mv^2/2 soo...

KE =mv^2/2 
KE= 1(2^2)/2 which the answer will come up by 2 Joules.
Answer 2

The answer is 2 Joules.

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Answers

water is the only one because it exists as ice, water, and water vapor

Answer:

Water

Explanation:

If we consider the planet to be Earth, it is water. It is the only item that exists in all three states of matter: Water (Liquid state), Ice (Solid state) and water vapor (Gaseous state) at standard pressure. No other elements/compound can exist in all three states at standard pressure. In fact, Earth is the only known planet to have this condition which makes it suitable for life.

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