- #1

Emperor

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## Homework Statement

A rifle bullet leaves the muzzle of a gun at 800. m/sec. The rifle barrel is 80. cm long and the mass of the bullet is 20.g. What force was needed to accelerate the bullet?

## Homework Equations

Formulas:

F(Total)= ma

F= mg

F = micrometers (m)(g)

## The Attempt at a Solution

t= 80 [itex]\div[/itex] 800 = .1s

a= 800 - 0 [itex]\div[/itex] .1 = 8000 m/s^2

The answer is provided on my sheet as 8000 N, but I don't have a clue as to how to do that. Its the closest I've gotten to the answer.