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A rigid massless rod of length 3l has tw...

A rigid massless rod of length `3l` has two masses attached at each end as shown in the figure. The rod is pivoted at point P on the horizontal axis (see figuare). When released from initial horizontal position, its instantaneous angular acceleration will be

A

`(g)/(13l)`

B

`(g)/(3l)`

C

`(g)/(2l)`

D

`(7g)/(3l)`

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Knowledge Check

  • A uniform rod of mass m and length l is fixed from Point A , which is at a distance l//4 from one end as shown in the figure. The rod is free to rotate in a vertical plane. The rod is released from the horizontal position. What is the reaction at the hinge, when kinetic energy of the rod is maximum?

    A
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    B
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    C
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    D
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  • Two blocks each of the mass m are attached to the ends of a massless rod which pivots as shown in figure. Initially the rod is held in the horizontal position and then released. Calculate the initial angular acceleration.

    A
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    B
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    A
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    B
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