B) A motor cycle of mass 200kg is moving over a horizontal road with uniform velocity. If this motorcycle has been stopped with a negative acceleration of 1.5m/s2, then what is the force of friction between the tyres of the vehicle and the road?
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Answer:
The motorcycle was moving on the road with a constant velocity. Now, due to to friction between the tyres and the road, the motorcycle stops. Hence, the friction acts as the stopping force for the object.
friction=stopping force
=mass * acceleration
==200*1.5
=300N
So , final answer is : 300 N