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General Physics

Hot goIITian

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18 May 2012 18:13:35 IST

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a body is projectd vertiacally frm earth,reaches height =R . the power exertd by the gravitational force is greatest a) at the instant jus aftr the body is projectdb)at h highest pt. c)at the instant jus b4 the body hits the ground d) remains const. all through xpailn

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PALAK JAIN

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18 May 2012 21:59:05 IST

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ppl???

Tarun Garg

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18 May 2012 23:04:32 IST

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is it a

Tarun Garg

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18 May 2012 23:06:22 IST

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i got it by fact that power=force*velocity nw both gravitation force and velocity decrease with increase im distance so it would be max. At point of projection

Gargee Mehta

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20 May 2012 17:00:27 IST

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but wouldnt it be the same for the option c.. here also force and velocity are max..

Tarun Garg

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20 May 2012 17:40:15 IST

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oh yeah u r write

Tarun Garg

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20 May 2012 17:46:19 IST

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bt in option c work is done by the system and hence net energy is negative by applying work done=final energy-intial energy bt in option a work is done on the system system and hence net energy bntained in the system in positive by work=final-intial so power=net work/time so power is max. In case a

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