A force of 5 N acts of a body at an angle of 60⁰ from the horizontal and displaces it horizontally by 10 m . Force of friction acting on the body of mass 5 kg in this case is 5 N. Find (i) work done by applied force (ii) work done by friction.
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*REMEMBER TO USE COS(60)°
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Answer:
1. 25J 2. -25J
Explanation:
Work by Applied Force:-
Force x Displacement x cos Θ
= 5N x 10m x Cos 60°
= 50J x 0.5
= 25J
Work by friction is equal and opposite to the work done by the applied force. Thus word done by friction is -25J
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