Question

A car is intentded to move on a rough road by applying force of 1000 n calculate the force of friction if car starts moving with constant velocity of 30km/hr on the rough road????????

Answer 1

Answer:

1000 N

Explanation: As car is moving with constant velocity , so acceleration of the car is zero. Then net force is equal to zero.Thus the applied force by car is equal and opposite to the frictional force.

     f - ma = lmg

Where, l is coefficient of friction

            f force applied by car

            a is the acceleration of the car which is zero

            m mass of the car

lmg = f = 1000 N = friction force

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