A Car is moving with a velocity 54 km/h. What is the k.e of a boy mass 40 kg sitting in a car
natramizh17:
hi
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We have,
velocity of the moving car=54 km/h.
=54*5/18 m/s=15 m/s.
mass of the boy sitting in the car=40 kg
Kinetic energy of the boy=1/2*m*v^2
=1/2*40kg*(15m/s)^2
=20 kg*225m^2/s^2
=4500 joules
Thus , the k.e of the boy is 4500 joules
velocity of the moving car=54 km/h.
=54*5/18 m/s=15 m/s.
mass of the boy sitting in the car=40 kg
Kinetic energy of the boy=1/2*m*v^2
=1/2*40kg*(15m/s)^2
=20 kg*225m^2/s^2
=4500 joules
Thus , the k.e of the boy is 4500 joules
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