A student unable to answer a question on W Newtons laws of motion attempts to pull himself up by...

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A student unable to answer a question on
W
Newtons laws of motion attempts to pull
himself up by tugging on his hair. He will not succeed.
(1) as the force exerted is small
(2) the frictional force while gripping, is small
(3) Newtons law of inertia is not applicable to
live beings
(4) as the force applied is internal to the system
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