Laws Of Motion Question 271

Question: 10,000 small balls, each weighing 1 gm, strike one square cm of area per second with a velocity 100 m/s in a normal direction and rebound with the same velocity. The value of pressure on the surface will be [MP PMT 1994]

Options:

A) 2×103N/m2

B) 2×105N/m2

C) 107N/m2

D) 2×107N/m2

Show Answer

Answer:

Correct Answer: D

Solution:

P=FA=n[mv(mv)]A=2mnvA

=2×103×104×102104

=2×107N/m2



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