Question

33. a) Derive an expression for kinetic energy of an object
b) If the velocity of an object is doubled. What will be change in its kinetic energy?​

Answer 1

Answer:

B)

see the answer in  second picture

a)

part-1

Suppose a body of mass m is moving with velocity v. It is brought to rest by applying a retarding force F. Suppose it traverses a distance s before coming to rest.

Kinetic energy of body, KE = Work done by retarding force to stop it.

part 2-

see the  first picture