a car of mass 400 kg is moving with a velocity 32m/s . suddenly the driver saw an obstacle on a road he applied takes and the car stopped. calculate the work done . ....
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Answer:
4800N.
Explanation:
Mass of the car =2400 kg
Initial velocity u=20 m/s
Final velocity v=0 m/s
Time t=10s
Retardation a=
t
v−u
=
10
0−20
=−2m/s
2
Force =m×a=2400×2=−4800N.
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