In the first law, an object will not change its motion unless a force acts on it. So I think the answer is A. Only objects that are moving.
Answer:
work=f(costheta)
Explanation:
work is done when a force acts on a body and displaces it on the direction of force
To increase the number of snowmen destroyed, you would want more energy and all of the above would increase the energy of the system so D.
Mass= density x volume
1.3 kg/m^3 x ( 2.5x4x10) m^3
= 130 kg