Question

a 2.0*10^3 kg car accelerates from rest under the actions of two forces. One is a forward force of 1140 N provided by traction between the wheels and the road. The other is a 950 N resistive force due to various frictional forces. Use the work-kinetic energy theorem to determine how far the car must travel for its speed to reach 2.0m/s?

Answer 1

according to the work enegry theorem, work done by all the forces is given by the change in kinetic energy of the body. here net force is 1140-950= 190N.
\[1/2 mv ^{2} = F.s\]