NEET | 2013Work, Power and EnergyHard
Question
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 constant speed v. What is the net force on the block of mass 2m ? (g is the acceleration due to gravity)
Options
A.6 mg
B.zero
C.2 mg
D.3 mg
Solution
As block of mass 2m moves with constant velocity so net force on it is zero.
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