Question
Wed February 20, 2013 By:
 

A mass of 10 kg is dropped from a height of 50 cm.Find it's : Potential energy just before dropping kinetic energy just on touching the ground velocity with which it hits the ground [given g = 10 metre per second square]

Expert Reply
Wed February 20, 2013
the potential energy of the mass: m g H = 10 (0.50) 10 = 50 J
 
according to the law of conservation of energy, the kinetic energy of the mass just before touching the ground is equal to the potential energy of the mass at the top and hence it is 50 J
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