A car of mass 550 kg is moving at a speed of 1.5 m/s. A man pushes the car,

increasing the speed to 3.2 m/s. How much work did the man do?

A. 2816 J

B. 3435 J

C. 2197 J

D. 4123 J

C. 2197 J

Explanation:

The work done = Energy change

The work done by man = Kinetic energy change of the car

Kinetic energy is the energy possessed by a moving object solely due to its motion.

You can get the K. E. of an object using the equation,

K. E. = (1/2) mv²

So you get,

The work done by man = K. E. change of the car

= (1/2) * 550 * (3.2) ² - (1/2) * 550 * (1.5) ²

= 2197.25 J