Question

A 2.00 g bullet is fired from a rifle with an in
itial velocity of 841
m/s. If the rifle
has a mass of 3.80 kg, the recoil speed of
the rifle

Answer 1

i did 0=mv+m2v2

Answer 2

i was getting 4.42*10^-2 but thats wrong ?

Answer 3

i get 4,42*10^-2 too

Answer 4

the answer is 3144

Answer 5

like 3.14*10^-4

Answer 6

@IrishBoy123 what u thiink?

Answer 7

your method seems sound though you are out by a factor of 10.

\(4.42(10^{-2}) \times 3.8 = 0.168\)
\(2(10^{-3}) \times 841 = 1.68\)

i just wonder if it's worth posting a scan of the question or a link...

Answer 8

@IrishBoy123 here

Answer 9

so that gives \(4.43 \times 10^{-1}\) or in the form the question requires:
a 4
b 4
c 3
d 1

which starts to *resemble* the answer you posted, when you posted it as "3144"

Answer 10

yes

Answer 11

so the answer is wrong ?

Answer 12

like a typo u think?

Answer 13

@IrishBoy123 can u help me with this ?

Answer 14

sure

post as a new question

if you can do that now, i can be here