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प्रश्न
Walking of a person on the road is an example of
विकल्प
scalars
unit vector
resolution of vectors
null vector
MCQ
उत्तर
resolution of vectors
Explanation:
A person walking pushes the road backward with his feet by a force F at an angle e with the ground. As illustrated in the image, the road reacts by exerting an equal and opposite force R (= F) on the feet. R can be broken down into two rectangular components.
Vertical element R sin θ balances the man's weight, while R cos θ helps the man go ahead as long as it is greater than the force of friction.
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