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.
Create a free account to view solution
View Solution FreeMore Work, Power and Energy Questions
If the length of a heater wire of 1000W, 220V is reduced by 20% then the power consumption will be...Force F on a particle moving in a straight line varies with distance d as shown in figure.The work done on the particle ...An ideal spring with spring constant k is hung from the ceiling and a block of mass M is attached to its lower end. The ...A mass m moves in a circle on a smooth horizontal plane with velocity v0 at a radius R0. The mass is attached to a strin...A stone tied to a string of length L is whirled in a vertical circle with the other end of the string at the centre. At ...