A bolt of mass 0.2 kg falls from the ceiling of an elevator moving down with an uniform speed of 
. It hits the floor of the elevator (length of the elevator = 5 m) and does not rebound. The amount of heat produced by the impact is (Take 
)
Text Solution
Verified by ExpertsB
: here, m = 0.2 kg. v= 5 ms -1
h = length of elevator = 5m
As relative velocity of the bolt w.r.t. elevator is zero therefore, in the impact, only potential energy of the bolt is converted into heat energy.
Amount of heat produced
= potential energy lost by the ball
= mgh
= (0.2 kg) (10 m s -2 ) (5m) = 10J
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