A car of mass 1.20 x 10^3 kg travelling on a straight road starts from rest and

Question

A car of mass 1.20 x 10^3 kg travelling on a straight road starts from rest and reaches a speed of 15.0 m s^-1 in 10.0 s. During the 10.0 s the engine exerts an average force of 2.00 kN. Calculate (a) the acceleration of the car. (b) the distance covered by the car during the 10.0 s. (c) the kinetic energy gained by the car during the 10.0 s. (d) the total work done by the car's engine during the 10.0 s. (e) the work done by the car's engine during the 10.0 s to overcome friction. (f) the average power output of the car's engine during the 10.0 s.

Explanation / Answer

a)F=ma

a=F/m=2/1.2*103

  =1/6*102

   =0.16*10-2

  

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