First slide

Constraints

Question

If the ring shown in the figure is restricted to move along the rod with speed 4m/s, the velocity of the mass ‘m’ is .......... m/s

Moderate

A

1
B

2
C

3
D

4

Solution

Velocity of ring is 4 m/s. The length of the string between the ring and the pulley is decreasing at a rate which is equal to the velocity (u) with which the block m is falling.
.: u = V_R cos 60⁰ = 4 x 1/2

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