a boy of 50kg is riding a scooter of 100 kg mass at a speed of v m/s. find v (m/s) if the kinetic energy of the scooter and the boy is 76.8 kj
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Total mass=(50+100)kg
=150kg.
K=76800 joule
By using the formula ,
K=1/2mv^2
V^2= 2K/m
=2*76800/150
=1024
V= 32m/s
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