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The horizontal beam in figure weighs 150...

The horizontal beam in figure weighs `150 N`, and its centre of gravity is at its centre. Find

The tension in the cable

A

`75N`

B

`500N`

C

`300N`

D

`625N`

Text Solution

Verified by Experts

The correct Answer is:
B
Taking torques about the pivot p

`(4m)(3//5)T=(4m)(300N)+(2m)(150N)`
so `T=625N`
b. The horizontal force must balance the horizontal component of the force exerted by the rope, or `T(4//5)=500N`
The vertical is `300N+150N-T(3//5)=75N`
upwards
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