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.

Related Questions

The only item that exists on the planet in all three states of matter at standard pressure is what

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.

The force that moving charged particles particles exert on one another is called_____.
a) electromagnetic force
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c) gravity
d) intermolecular force

Answers

electromagnetic force

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Answers

It's a negatively charged ion.
I have just taken the test, the answer is: a negatively charged ion. 
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