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

justjm · Answer

The value of Kinetic energy at ground level is the mathematical equivalent of potential energy due to gravity at the top. Thus, apply the formula for PE/KE.

$KE=PE_{gravity} = mgh $
mass=0.18 kg
height = 45
g = acceleration due to gravity = 9.81 m/s^2

Now it's just multiplying. You can do this.