Answer:
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
