Posted by **Anonymous** on Sunday, August 21, 2011 at 5:53am.

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

- physics -
**drwls**, Sunday, August 21, 2011 at 7:56am
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.

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