Question

A ball is thrown straight up. At what point does the ball have the most energy? Ignore air resistance.

a. At the highest point of its path.
b. When it is first thrown.
c. Just before it hits the ground.
d. Everywhere; the energy of the ball is the same at all of these points.
e. When the ball is halfway to the highest point of its path.

Answer 1

Answer:

Everywhere; the energy of the ball is the same at all of these points.

Explanation:

A ball is thrown straight up. The total energy of an object remains constant as per the law of conservation of energy. At the highest point the object have only potential energy and at lowest point it have only kinetic energy. As a result, the total energy remains constant.

So, at every point the energy of the ball is the same at all of these points. Hence, the correct option is (d).

Answer 2

Energy is the capacity of doing work. When a  ball is thrown straight up, the point at which the ball has the most energy is at every point.

What is the law of conservation of energy?

According to the law of conservation of energy, energy can neither be created nor be destroyed, it can only transform from one form to another.

Now, we know that when the ball is thrown it has some kinetic energy, and as the ball is slowing down due to gravity force, the kinetic energy of the ball is converted to the potential energy. And the same happens when the ball is falling back. therefore, the energy of the ball is the same everywhere.

Hence, when a  ball is thrown straight up, the point at which the ball has the most energy is at every point.

Learn more about Law of Conservation of Energy:

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