A large slab of mass 5 kg lies on a smooth horizontal surface, with a block of mass 4 kg lying on the top of it; the coefficient of friction between the block and the slab is 0.25. If the block is pulled horizontally by a force of N, the work done by the force of friction on the slab between the instants s and s is
1
2.4 J
2
5.55 J
3
4.44 J
4
10 J
Official Solution
Correct Option: (2)
Step 1: Understanding the Concept: Check if both move together. Maximum friction N N, so they move as one.
Step 2: Detailed Explanation: Combined acceleration: m/s . Friction on slab: N. Displacements: m; m. Displacement in interval: m. Work done by friction on slab:
Step 3: Final Answer: Work done by friction on slab J.
02
PYQ 2023
medium
physicsID: met-2023
A force acts on a particle in x-direction, where is in newton and in metre. The work done during displacement from m to m is:
1
2
3
4
None of these
Official Solution
Correct Option: (2)
Concept:
Work done by variable force:
Step 1: Step 2: Step 3:
