Solveeit Logo
Login

Question

Question: In the given diagram, with what force must the man pull the rope to hold the plank in position? Weig...

In the given diagram, with what force must the man pull the rope to hold the plank in position? Weight of the man is 60 kgf. Neglect the weights of plank, rope and pulley.

A

15 kgf

B

30 kgf

C

60 kgf

D

120 kgf

Answer

15 kgf

Explanation

Solution

Let pulling force is F

then (F + F + 2F) = mg ̃ F = mg4\frac { \mathrm { mg } } { 4 }