Laws of MotionHard
Question
A block of mass 3kg is pulled up on a smooth incline of angle 37o with the horizontal. If the block moves with an acceleration of 2m/sec2, then the power delivered by the pulling force at t = 5sec after the start of motion -
Options
A.120 W
B.240 W
C.60 W
D.480 W
Solution
F - mg sin 37o = ma
F = mgsin37o + ma = 3 × 10 ×
+ 3 × 2 = 24v = u + at = 0 + 2 × 5 = 10
P = Fv = 240 watt
Create a free account to view solution
View Solution FreeMore Laws of Motion Questions
A material body A of mass m1 exerts a force on another material body of mass m2. If the acc. be a2, the magnitude of the...The ratio of weight of a man in a stationary lift and in a lift accelerating downwards with a uniform acceleration is 3 ...In other to raise a mass of 100 kg a man of mass 60 kg fasten a rope over a smooth pulley. He climbs the rope with an ac...System is shown in the figure and man is pulling the rope from both sides with constant speed ′u′. Then the ...A body of mass m1,exerts a force on another body of mass m2, If the magnitude of acceleration of m2 is a2, then the magn...