A car is moving with a velocity of 90 km/h and it takes 5 seconds to stop after the brakes are applied. Calculate the force exerted by the brakes on the motorcar if its mass along with the passengers is 2000 kg.
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Explanation:
Force=mass*acceleration
f=m×
t
v−u
f=1000×
4
0−108×
18
5
=1000×(−7.5)
∴f=−7500N
opposing force is denoted by negative sign.
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