A block of mass 20 kg is slowly slid up on a smooth incline of inclination 53° by a person. Calculate the work done by the person in moving the block through a distance of 4 m, if the driving force is
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
( 640 J 640J)
Sol.
W 1 = (mg sin θ) 4
= (20 × 10 × 
) = 640 J
+ 
= 
K = 0
– (mg sin θ) = 0
W 2 = 
= 4 mg sin θ = 640 J
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