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A mass of mass 60 kg hangs himself from ...


A mass of mass 60 kg hangs himself from a massless spring balance. Which itself suspneded from an ideal string-pulley system as shown in the figure. The stirng AB can bear maximum 900 N. Choose correct statement.

A

The man is never ever able to read his correct weight in the spring balance.

B

If man is able to manage himself at rest, the spring balance reads his true weight.

C

The maximum magnitude of accelerationman can manage is 12.5 `m//s^(2)` while moving upward.

D

When man moves downward with acceleration `5m//s^(2)` the spring balance will read 40 kg.

Text Solution

Verified by Experts

The correct Answer is:
C
`2T-Mg+T=MaimpliesMg-3T=Maimplies3T=M(g-a)` ..(i)
2T=kx
`T=(M(g+a))/(3)`
Reading of spring balance `=(kx)/(g)=(2T)/(g)={{:((2M(g+a))/(3g),("When moving upward")),((2M(g-a))/(3g),("When moving downward")):}`
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