Find the force required to stop a car of mass 100kg with two passengers of 50kg each sitting inside,if it is moving at 60km/hr speed and takes 5s to stop.
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U= 60kmph=16.6mps
V=0mph
M=100kg+(50*2)kg=200kg
t=5s
F=?
We know that force is equal to M*a (mass*acceleration),
Therefore, putting all the values we get:
F=200kg*(0-16.6/5)
=200kg*(-16.6)/5
=20*(-16.6)
= -332N
Here, the ‘-‘ sign indicates that the force is required in the opposite direction of the motion the car.
Thx
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2
Use the equation of motion to splve this question as given below
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