A porter with a suitcase of mass 20 kg on his head moves up a staircase upto a height of 4 m. The amount of work done by the upward lifting force relative to him and relative to a person on the ground respectively, are
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Work done by the force relative to porter will be zero because displacement relative to porter
is zero.
Now, work done by the force relative to a person on the ground,
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 is moving on a circle of radius 5 m. A constant force of magnitude 10 N acts on the part…
The graph shows the variation of acceleration with position of a 3 kg particle, initially at rest, …
A body of mass 6 kg, under the action of force, suffers displacement, given by , where t is time. …
In the track shown in the figure, section is a quadrant of a circle of 1 m radius. A block is rele…
The ratio of work done by the internal forces of a car to change its speed from to, is (Assume th…
A block, attached to a spring is kept on a smooth surface, and is pulled by a constant horizontal f…