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

Three blocks with masses m, 2m and 3m are connected by strings as show

1.	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
Answer» 6mg ZERO 2mg 3 MG SOLUTION :The speedof MASS isconstantso theaccelerationwill be zero . `F=ma ` `F = m XX 0 = 0`