Q. 5 E4.3( 21 Votes )

Solve the followi

Answer :

Here a book is displaced by 30 cm due to 10 N force, as depicted in the figure



we know work done on an object due to a force is given by relation


W = FS


Where W is the work done due to force F in displacing object by S in the direction of force.


Here the force applied is


F = 10 N


The displacement of book in the direction of force


S = 30 cm


All units should be in SI so converting cm to m


1 cm = 1/100 m


So we get displacement as


S = 30 × 1/100 = 30/100 m = 0.3 m


So work done on the book is


W = 10 N × 0.3 m = 3 N


i.e. Ravi did 3 J work to move the book


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