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)

What is power? How do you differentiate kilowatt from kilowatt hour? The Jog Falls in Karnataka state are nearly 20 m high. 2000 tonnes of water falls from it in a minute. Calculate the equivalent power if all this energy can be utilized? (g = 10 m s⁻²)

Compare the energy possessed by the virtue of position for the 2 bodies shown below.

A 10 kg ball is thrown upwards with a speed of 5 m/s. (i) Find its potential energy when it, reaches the highest point. (ii) Calculate the maximum height it reaches.