Question

A 5 kg rifle fires a 0.25 kg bullet at a muzzle velocity of 500 m/s. Find the recoil velocity of the rifle.

Answer 1

well, do u know the formula for finding final velocity ?

Answer 2

yes. but we have to use this formula for solving this problem
M1V1+M2V2=M1V1'+M2V2'

Answer 3

what would be the values for V1, V2, V1', V2' ?
Im not sure what to solve for.

Answer 4

r u sure this is the formula that u are being asked to use, because it will give u 1m/s then?

Answer 5

v1 is the initial velocity and V2 is the second velocity that you are given

Answer 6

yes. our topic is about momentum.

Answer 7

so is 500 m/s v1 or v2?

Answer 8

V2

Answer 9

and v1 would be 0?

Answer 10

it would be X as we are asked to find this, so we would put v2 as unknown

Answer 11

what values would i substitute in the formula?

Answer 12

i know M1= 5 kg
M2= 0.25 kg

Answer 13

yea

Answer 14

what about the values for v1, v2, v1' and v2'?

Answer 15

i told u already look up

Answer 16

i'm a bit confused, you said v2 would be 500 m/s then you sad again it would be unknown.

Answer 17

*said

Answer 18

my bad V1 would be unknown

Answer 19

ok. then what about v1' and v2' ?

Answer 20

its same thing

Answer 21

ok thanks.