# A ball is thrown straight up into the air. At what position is its kinetic energy a maximum? At...

## Question:

A ball is thrown straight up into the air. At what position is its kinetic energy a maximum? At what position is the gravitational potential energy of the ball-Earth system a maximum?

## Kinetic and Potential energy:

The energy of the object due to the motion or the velocity of the object is known as the kinetic energy. As the velocity of the object decrease, the kinetic energy will also decrease. And the potential energy is due to the virtue of the height of the object, it will increase with increase in the height of the object.

## Answer and Explanation:

When the ball is thrown, it will have only kinetic energy because the potential energy would be zero (taking reference at the same position). As the ball moves upward, the speed (or the kinetic energy) of the ball decreases and the height (or the potential energy) of the ball will increase.

At the maximum height, the velocity (or the kinetic energy) of the ball becomes zero. Therefore, the total energy will be in the form of potential energy.

**Therefore, kinetic energy will be maximum at the bottom and the potential energy will be maximum at the top**

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from Physics for Kids

Chapter 1 / Lesson 9