A force does work on an object if a component of the force is called

Explanation:

The work done by an object is given by :

Here,

F is force

d is displacement

is the angel between F and d.

If the angle between force and displacement is 0, then the work done is equal to, .

So, a force does work on an object if a component of the force is parallel to the displacement of the object.    

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