Question

1000 small balls each weighing 1 g strike one sq. cm of a area per second with a velocity of 100 m/sec in a normal direction and rebound with the same velocity. The pressure on the surface (in N/m${}^2$) is :

• A. $2\times {10}^3$
• B. $4\times {10}^6$
• C. ${10}^7$
• D. $2\times {10}^6$

Answer 1

The correct option is D $2\times {10}^6$