Work Energy Power – Notes

Work and Energy – Work

Work done by force acting on an object is equal to the magnitude of the force multiplied by the displacement of the object in the direction of the force.

Condition for work to be done:

• A net force act on an object.
• The object must be displaced in the direction of the net force.

Definition of work: Work is said to be done when an object is displaced on applying a certain force.

Work done is the product of force and displacement: (W = F x s)

Work is measured in joule in the SI system. One (j) is the work done when the net force of one newton acts on body and displaces in the direction of the force by the metre.