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Renu observed that as a stone of mass 1kg falls freely from a height 1m, its potential energy gets converted into kinetic energy. Therefore, its potential energy decreases and kinetic energy increases. As the stone touches the ground, all its potential energy is converted to the kinetic energy.
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?
A body is falling from a height h. After it has fallen a height h/2, it will possess
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.
Read the given passage and answer the questions that follow based on the passage and related studied concepts. When an object is allowed to fall from higher level to a lower level, it gains speed due to gravitational pull, i.e., it gains kinetic energy. Therefore, in possessing height, a body has the ability to convert its height into kinetic energy, i.e., it possesses potential energy. The magnitude of its gravitational potential energy is equivalent to the amount of work done by the weight of the body in causing the descent. If a mass m is at a height h above a lower level, the P.E. possessed by the mass is mgh. The chosen level from which height is measured has no absolute position. It is, therefore, important to indicate clearly the zero P.E. level in any problem in which P.E. is to be calculated. The potential energy of a body may be positive or negative. Based on the above information, Answer the following questions:
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