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Block B has mass m and is released from ...

Block B has mass m and is released from rest when it is on top of wedge A, which has a mass 3m. Determine the tension in cord CD needed to hold the wedge from moving while B is sliding down A. Neglect friction.

A

`2mg cos theta`

B

`(mg)/(2) cos theta`

C

`(mg)/(2) sin theta`

D

`mg sin 2 theta`

Text Solution

Verified by Experts

The correct Answer is:
C
`T=N sin theta and N = mg cos theta`
`T=mg cos theta sin theta =(mg)/(2) sin 2 theta`
.
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