Published by:
CGP EDU Academic Team
Published on: September 12, 2026
The system shown in figure is released from rest. String is massless and pulley is smooth. Find –
A
The work done by gravity on 4 kg block in 2 second
B
The work done by string on 1 kg block in the same interval of time (Take g = 10 m/s 2 ) 
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
Work done by gravity: 
Since gravity acts in the same direction as the displacement, 
and 
:
Substitute the values:
First, find the tension T from the equation for the 1 kg block:
Work done by the string: 
Since the tension acts in the same direction as the displacement, 
and 
:
Substitute the values:
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
A particle moves under the effect of a force F = Cx from $x=0$ to $x = x_1$ . The work done in the …
A cord is used to lower vertically a block of mass M by a distance d with constant downward acceler…
Two springs have their force constant as k 1 and $k_{2}(k_{1} > k_{2})$ . When they are stretched b…
The potential energy of a certain spring when stretched through a distance ‘S’ is 10 joule. The amo…
A position dependent force newton acts on a small body of mass 2 kg and displaces it from to . T…
A body of mass 3 kg is under a force, which causes a displacement in it is given by $S = t^{4} - 3t…