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A man of mass m stands on a platform of ...

A man of mass `m` stands on a platform of equal mass `m` and pulls himself by two ropes passing over pulleys as shown in figure.If he pulls each rope with a force equal to half his weight ,his upwards acceleration would be

A

`g//2`

B

`g//4`

C

`g`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
D
for `(` man `+` platform `)` system `:`
`2mg-4T=2m(a)`

`rArr2mg-4((mg)/(2))=2m(a)=2m(a)[ :'T=(mg)/(2)]`
`rArr a=0`
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Knowledge Check

  • A man of mass m stands on a plateform of equal mass m and pulls himself by two rops passing over pulleys as shown in figure.If he pulls each rop with a force equal to half his weight ,his upwards acceleration would be

    A
    `(g)/(2)`
    B
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    A
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