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

`"mnu"^(2)`

`2"mnu"^(2)`

`2"mnu"`

`1/2"mnu"^(2)`

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Verified by Experts

The correct Answer is:

`"Force"=("change of momentum")/("time")="2 mun"`

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