JEE Main 2026 Apr 2 Shift 2, Physics Q11: Work Energy Theorem And Its Applications
JEE Main2026Apr 2, Shift 2Physics
Q.
A spherical ball of mass kg falls from a height of m and is brought to rest after penetrating cm into sand. The average force exerted by sand on the ball is ______N.
- A
- B
- C
- D
Solution
Using work-energy theorem over the entire motion (start at rest, end at rest), the net work is zero.
Gravity acts over total distance m doing work J.
Sand exerts force opposing motion over m, doing work .
Setting net work to zero: , giving N.
Concept behind this question
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