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Titan97
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Homework Statement
[/B]
A rod of mass m is attached on the ceiling inside a cart of mass 6m kept at rest. Length of rod is L. Find the velocity of rod with respect to cart when the rod becomes vertical after releasing it. The rod is free to rotate about its point of suspension.
Homework Equations
Conservation of energy and momentum
The Attempt at a Solution
With respect to earth, let velocity of center of mass of rod be ##v_1## and velocity of cart be ##v_2##.
Using COE,
$$mg\frac{l}{2}=\frac{1}{2}mv_1^2+\frac{1}{2}(6m)v_2^2$$
Since centre of mass remains at rest, ##mv_1=6mv_2##
$$V_1=\sqrt{\frac{7}{6}gl}$$
So ##v_{\text{rel}}=\frac{v}{6}+v##
But I am not getting the correct answer.
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