Question

The incline is 0.25 m height and has a length of 0.65 m.

What is the initial Gravitational Potential Energy of the Ball at the top of the incline?

Answer 1

The potential energy of an object with mass 'm' at height 'h' from ground is given by -

PE = mgh

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Now, note that the incline is 0.25 in height. Thus, h = 0.25m.

Thus, for a ball of mass 'm' at the top, the gravitational potential energy is -

PE = 0.25mg

For g = 9.8 m/s² we get -

PE = 2.45m Joules.

That means you just need to multiply the mass of ball by 2.45 to get its potential energy at the top of inclined plane.

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