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Three blocks with masses m , 2m and 3m a...

Three blocks with masses `m` , `2m` and `3m` are connected by strings, as shown in the figure. After an upward force `F` is applied on block `m` , the masses move upward at costant speed `v` . What is the net force on the block of mass `2m` ? (`g` is the acceleration due to gravity). ltBrgt

A

6 mg

B

Zero

C

2 mg

D

3 mg

Text Solution

Verified by Experts

The correct Answer is:
B
As block of mass 2m moves with constant velcoity (a = 0 ) so net force on its is zero.
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