Question

What is needed for work to be done?

A force must push on an object without moving it.
A force must pull on an object without moving it.
A force must cause an object to move along the same direction as the force.
A force must act on an object while an equal force acts oppositely on the object.

Answer 1

For work to be done, a force must cause an object to move along the same direction as the force.
Hope this helps|!

Answer 2

Answer: A force must cause an object to move along the same direction as the force.

Explanation:

Work is defined as displacement in the position of an object due to action of force. Mathematically the work done is a product of force and displacement of an object. The direction of the force applied and direction in which object is displaced is always same.

$Work=Force\times Displacement$

When work is done,a force must cause an object to move along the same direction as the force.