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The simple 2Kg pendulum is released from...

The simple `2Kg` pendulum is released from rest in the horizontal position. As it reaches the bottom position, the cord wraps around the smooth fixed pin aat `B` and continues in the smaller arc in the vertical plane. Calculate the magnitude of the force `R` supported by the pin at `B` when the pendulum passes the position `theta=30^(@),(g=9.8m//s^(2))`

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