Two masses M and m are tied with a string and arranged as shown. What is the velocity (in m/s) of block M when it loses the contact with the ground ? m = 1 kg and M = 2kg. h = 90 cm.

Engineering

Physics

Work Done by a Constant Force

Conservation of Energy

Constrained Relation

Question

Two masses M and m are tied with a string and arranged as shown. What is the velocity (in m/s) of block M when it loses the contact with the ground ? m = 1 kg and M = 2kg. h = 90 cm.

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$mg \times 2 h = \frac{1}{2} {mv}^{2}$

$u = \sqrt{4 gh} = \sqrt{4 \times 10 \times 0 .9} = 6 m / s$

m × 6 = (m + M)v

$v = \frac{1 \times 6}{3} = 2 m / s$