At the middle of the ramp their will be potential energy associated with the ball and the total mechanical energy will be equal to its potential energy . At the bottom of the ramp their will be kinetic energy associated with the ball and total mechanical energy will be equal to its kinetic energy .
What is mechanical energy ?
Mechanical energy is the energy that is possessed by an object due to its motion or due to its position.
Total mechanical energy = potential energy + kinetic energy
When ball is positioned in the middle of the ramp , the ball is at rest , which implies that total mechanical energy is equal to potential energy possessed by the ball and their is no kinetic energy at that instant of time , after that it came under the action of forces due to which it rolls down and its potential energy starts converting into kinetic energy and the total mechanical energy will be the sum of potential as well as kinetic energy and when it reaches at the bottom of the ramp the total mechanical energy will be kinetic energy of the ball.
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