A block of mass 2 kg is hanging over a smooth and light pulley through a light string. The other end of the string is pulled by a constant force F = 40 N. At t = 0 the system is at rest as shown. Then in the time interval from t = 0 to t = 
seconds, pick up the correct statement (s): (g = 10 m/s 2 )
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(a, c)
Acceleration of block is = 10 m/s 2
displacement s = 
at 2 = 
× 10 × 
= 2m
Tension in the string is 40 N
Work done by gravity is
and work done by tension is
40 × 2 = 80 J
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