8. FORCE AND LAWS OF MOTION
easy

हम एक लकड़ी के बक्से को $200\, N$ बल लगाकर उसे नियत वेग से फ़र्श पर धकेलते हैं। बक्से पर लगने वाला घर्षण बल क्या होगा ?

A

$100$

B

$400$

C

$200$

D

$300$

Solution

A force of $200\, N$ is applied in the forward direction. Thus, from Newton's third law of motion, an equal amount of force will act in the opposite direction. This opposite force is the fictional force exerted on the cabinet. Hence, a frictional force of $200\, N$ is exerted on the cabinet.

Standard 9
Science

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