Question

For work to be accomplished we must have

an action which causes movement and an opposite reaction.

an action which causes no movement or reaction.

a force and a movement in the opposite direction of the force.

a force and a movement in the same direction as the force.

Answer 1

The answer they are looking for is the last one. However the last two are technically correct but the third one would result in negative work.

Answer 2

a force and a movement in the same direction as the force.

Step-by-step explanation:

As we know that the formula to find the work done is given by

`W = \vec F. \vec d`

here if the force is applied at some angle with displacement then in that case

`W = F d cos\theta`

now we know that if the force and displacement is in opposite direction then the work done is negative while if the force and displacement is in same direction then the work done is positive

So work to be accomplished only when the sign of the work done is positive so it must be in the same direction as that of displacement of the object

so correct answer would be

a force and a movement in the same direction as the force.