Question

During a race, you are accelerating on a leveled track and acquire a kinetic energy three times your initial kinetic energy. What is the change in your potential energy?

• A. It becomes $\frac{1}{9}$ times of initial potential energy.
• B. It does not change.
• C. It becomes 3 times of initial potential energy.
• D. It becomes $\frac{1}{3}$ times of initial potential energy.

Answer 1

The correct option is B It does not change.

When we are running on a leveled track, the distance between the ground and the centre of mass of the body remains constant.

Potential energy depends on the height and mass of the object.

In the current situation, height is constant as we are running on a leveled track. We know that here mass is constant, therefore, there is no change in the potential energy.