A mechanic pushes a 3.00 x 10^3-kg car from rest to a speed of v, doing 4,750 J of work in the process. During this time, the car moves 23.0 m. Neglecting friction between car and road, find each of the following.

a) The speed, v

b) horizontal force exerted on the car

Question

A mechanic pushes a 3.00 x 10^3-kg car from rest to a speed of v, doing 4,750 J of work in the process. During this time, the car moves 23.0 m. Neglecting friction between car and road, find each of the following.

a) The speed, v

b) horizontal force exerted on the car

anonymous · Answer

Calculate horizontal force on the car by using work done = force * displacement
calculate acceleration from this force using force = mass times acceleration
Then calculate velocity.