Question

w of energy
Q. 16. An object of mass, m is moving with a
constant velocity, v. How much work should be
done on the object in order to bring the object to
rest?​

Answer 1

Answer:

-1/2 mv^ 2

Explanation:

Is it clear ok I hope

Answer 2

Explanation:

An object with mass 'm' moving with velocity 'V' has kinetic energy of

2

1

mv

2

.

In order to bring it to rest, its velocity has to be reduced to zero, and in order to

accomplish that, the kinetic energy has to be drained off and sent somewhere else.

An external force has to absorb energy from the object, i.e. do negative work on it,

equal to its kinetic energy,or

−

2

1

mv

2

.