Q26 of 54 Page 135

What do you mean by work? How the work done is calculated if the direction of force is different than the direction of displacement. Explain with example.

Work is done when a force is applied to move any object from rest or change the speed of any moving object. Work is a scalar quantity and it can be positive or negative.

Mathematically, work(W) is the product force and displacement.


W = F × S


Then,


W = Fcosθ × s



If the block is given force in a direction making an angle of with the direction of propagation of the block, then the work done is given by


W = Fcosθ × s


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