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In the figure shown the force with which...

In the figure shown the force with which the man should pull the rope to hold the plank in position is `F` . If weight of the man is `60kgf` , the plank and pulleys have negligible masses, then.

A

`F=150N`

B

`F=300N`

C

`F=600N`

D

`F=1200N`

Text Solution

Verified by Experts

The correct Answer is:
A
(For printer) `T+F-m_(p)g=m_(p)a` (i)
(For crater) `T-Fm_(c)g=m_(c)a` (ii)
Subtracting (ii)form (i), we get
`2F+(m_(c)-m_(p))g=(m_(p)-m_(c))a`
`900+(25-100)(10)=75a`
`900-750=75a`
`A=2ms^(-2)` .
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