Posted by Anonymous on .
the velocity of a car increases from 36km/hr to 54km/hr in one minute determine the force exerted by the engine on the car mass of the car is 120kg
First convert those two speeds to m/s.
Then compute the acceleration,
a = (V2 - V1)/60 s, in units if m/s^2
Then use F = M a for the accelerating force in Newtons.
The force exerted by the engine is actually higher thn that because there is a backwards air resistance force.