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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 figure). When released from initial horizontal position, its instantaneous angular acceleration will be:

 

(a)

(b)

(c)

(d)



Question ID - 50279 | SaraNextGen Top Answer

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 figure). When released from initial horizontal position, its instantaneous angular acceleration will be:

 

(a)

(b)

(c)

(d)

1 Answer
127 votes
Answer Key / Explanation : (c) -

Applying torque equation about point P.

2m0 (21)−5 m0 gl=I

I=2M0 (21)2+5M0 I2=13 M0I2d

=

=

= anticlockwise

127 votes


127