A bob of mass of 0.18 kilograms is released from a height of
45 meters above the ground level. What is the value of the kinetic energy gained by the bob at the ground level?

Question

A bob of mass of 0.18 kilograms is released from a height of
45 meters above the ground level. What is the value of the kinetic energy gained by the bob at the ground level?

shane_b · Answer

$$Potential ~Energy = mgh=(0.18kg)(9.8m/s^2)(45m)=79.38J$$

When the bob gets to the ground level all of the potential energy will have been transferred to kinetic energy...so it gained 79.38J of kinetic energy.

anonymous · Answer

options are only 
2.4
5.1
8.1
10.0

shane_b · Answer

Then either something is wrong in the question or in the answers.  This is a very simple problem.

anonymous · Answer

answer is 8.1

anonymous · Answer

yu pther is something wrong in the question