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n balls each of mass m impinge elastical...

n balls each of mass m impinge elastically each second on a surface with velocity u. The average force experienced by the surface will be

A

`"mnu"`

B

`2"mnu"`

C

`4"mnu"`

D

`"mnu"//2`

Text Solution

Verified by Experts

The correct Answer is:
B
`F_(avg)=ma,a=(v-u)/(t)`
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Knowledge Check

  • n small balls, each of mass m and velocity u strike elastically on a surface per second. The force exerted on the surface

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