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A disc without slipping rolls down a hill of height 10m .it is a disc starts from the rest at the top of the hill. what is the speed at the bottom? |
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Answer» c is placed at the top of a hill of height 1000 cm = 10 m. It posses potential ENERGY which is converted to kinetic energy as it rolls down. The motion of the disc during ROLLING down is of two TYPES; linear and rotational and hence do the kinetic energy. As the P.E is converted to K.E (WITHOUT slipping means there is no friction and all the potential energy is converted to kinetic energy), therefore,Loss in potential energy = Gain in kinetic energyGiven Height = 10 m vi = 0 m/s g = 9.8 m/s2Required vf =?Now P.E = mgh, therefore,PUTTING these values,Putting the values |
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