MHT CET 2024 Physics question
1000 small balls, each weighing 1 gram, strike one square cm of area per second with a velocity in a normal direction and rebound with the same velocity. The value of pressure on the surface will be
Answer: (B)
Solution
Each ball has mass kg and rebounds elastically, so its change of momentum is . In one second 1000 balls strike, so the force . The area is
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