- #1

mikex213

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## Homework Statement

(1)A 5g bullet leaves the muzzle of a rifle with a speed of v=320m/s. what force (assumed constant) is exerted on the bullet while it is traveling down the 0.82m-long barrel of the rifle?

(2)Two forces are applied to a car in an effort to move it. what is the resultant of these two forces? if the car has a mass of 3000kg, what acceleration does it have? ignore friction.

The car is facing 90degree position, 1st force is 60degrees at 400N, 2nd force is at 100degrees at 450N.

## Homework Equations

d=vt

a=v/t

f=ma

## The Attempt at a Solution

(1) i tried, d=vt, .82=320m/s*t, t=.003s

a=v/t, a=320m/s / .003s, a=124800m/s^2

f=ma, F= .005kg*124800m/s^2, F=624N

(2) i don't know how to do this one..