Question

A ball of mass 0.4kg is dropped from a height of 30m. Determine the potential energy
on impact to the ground.
A. 120 J B. 100 J C. 70 J D. 102 J​

Answer 1

Answer:

Ans is 120J

Explanation:

Given that,

mass-0.4

height-30m

potential energy?

potential energy=m*g*h। [g=9.8 but we take

approx 10]

potential energy=0.4*10*30

potential energy=4*30

potential energy=120J