(D) According to Newton's third law,for every action,there is an equal and opposite reaction. When the student pulls his hair,he exerts a force on his

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The force applied is internal to the system.

(D) According to Newton's third law,for every action,there is an equal and opposite reaction. When the student pulls his hair,he exerts a force on his hair,and his hair exerts an equal and opposite force on his hand. Since both the student and his hair are part of the same system,these forces are internal forces. Internal forces cannot change the state of motion of the center of mass of a system. Therefore,the student cannot lift himself up.

Class 11 Physics Laws of Motion Third Law of Motion and Momentum and Impulse

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$A$ student attempts to pull himself up by tugging on his hair. He will not succeed because:

A
The force exerted is small.
B
The frictional force while gripping is small.
C
Newton's law of inertia is not applicable to living beings.
D
The force applied is internal to the system.

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Laws of Motion

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Third Law of Motion and Momentum and Impulse

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If two balls each of mass $0.06 \,kg$ moving in opposite directions with speed $4 \,m/s$ collide and rebound with the same speed,then the impulse imparted to each ball due to the other is ........... $kg \cdot m/s$.

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$A$ student attempts to pull himself up by tugging on his hair. He will not succeed because:

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$A$ man is at rest in the middle of a pond on perfectly smooth ice. He can get himself to the shore by making use of Newton's

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