Question

The weight of a person on a planet A is about half that on the earth. He can jump upto 0.4 m height on the surface of the earth. How high he can jump on the planet A?

A ball is dropped from a height of 10 m. If the energy of the ball reduces by 40% after striking the ground, how much high can the ball bounce back? (g = 10 m s⁻²)

A simple pendulum is released at position A and swings to position B as shown in Figure. One complete oscillation is when the pendulum swings from A to B and then returns to A. Why does the bob eventually come to rest? What happens to its energy eventually?

A ball dropped from a height of 20 m loses 40% of its energy after impact on the ground. To what height will the ball rise after the impact?

A simple pendulum consists of a bob of mass 250 g. While oscillating, the bob rises to a vertical height of 5 cm, from the mean position. Calculate the total energy of the pendulum bob at any point. Also, find the velocity of the bob at the mean position. (Take g = 10 m s⁻²)