Question

drive an expression for the kinetic energy of an object​

Answer 1

Answer:

HEYA!!UR ANSWER IS THIS

Explanation:

The equation for kinetic energy is: KE=21mv2.

HOPE ITS HELPFUL

Answer 2

Answer:

Consider a body of mass ‘m’ at rest. Let a constant force F act on the body producing an

acceleration ‘a’ for a distance ‘s’. Let the velocity of the body be changed to v.

In this case, initial velocity =0.

Final velocity =v.

Using, v2=u2+2as

v2=0+2as

v2=2as

s=2av2

Work done F∗s

=mas=ma2av2

Work done =21mv2

By definition this work done is equal to the kinetic energy.

∴ kinetic energy of the body, Ek=21mv2.