Question

A force of 1 N displaces a body A by 1 metre, Another
force of 1 N acts on a body B for 1 sec. If both the
bodies are of I kg each, then kinetic energy attained by:
(1) A is more
(2) B is more
(3) Both A and B is same
(4) A is half of B​

Answer 1

Correct option is

A

1J

B

1Nm

Work done by any force is given by dot product of force and displacement of the particle.

So W=F.S

Where F,S are vector quantities and W is scaler quantity.

SI Unit of work done is N.m and also called Joule(J).

So work done in above case is W=FSCosθ, here θ=0

So W=1Jor1N.m.

So best possible answer is A and B.