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Question: Two bodies of masses m and M (M \>\> m) are attached to the two ends of a light string passing over ...

Two bodies of masses m and M (M >> m) are attached to the two ends of a light string passing over a pulley (light and smooth). What is the tension in the string when the masses are in motion?

A

(M - m)g

B

2mg

C

Mg

D

(m + M)g

Answer

2mg

Explanation

Solution

T = 2MmgM+m\frac{2Mmg}{M + m}. As M > > m × T ~ 2mg