A block of mass m = 2kg is pulled along a rough horizontal surface by applying a constant force at an angle θ = tan –1 2 with the horizontal as shown in the figure. The friction coefficient between the block and the surface is µ = 0.5. If the block travels at a uniform velocity v = 5 m/s then calculate the average power (Watt) of the applied force. (Take acceleration due to gravity g = 10 m/s 2 )
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(25)
Sol. F cos θ = µN
N =mg – F sin θ
F = 
P = F v cos θ = 
= 
= 25W
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