A 1300-kg car moving at 20 m/s hits the fence and comes to a stop in 2 s.what is the average force acted on the car
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Answer:
1.
Given:
Mass = 1300kg
Acceleration = 20m/s
Time = 2s
Force = ?
F = ma/2
F = 1300 x 20 ÷ 2
F = 26000 ÷ 2
F = 13000 N
∴ The average Force of the car is 13000N.
2.
Given:
F= 750N
t = 0.002s
Impulse =?
Impulse = Force × time
750 N×0.002 s = 1.5 Ns
∴ The impulse of the tennis ball is 1.5 Ns
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