Hello, I was able to answer the first portion, but the $2$nd portion is confusing me$.$ A rifle with a weight of $25N$ fires a $4\mathrm{.}7-g$ bullet with a speed of $200\frac{m}{s}.$

$($a$)$ Find the recoil speed of the rifle.

$($b$)$ If a $675-N$ man holds the rifle firmly against his shoulder, find the recoil speed of the man and rifle.

Your response is within $10\%$ of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate

results to at least four$-$digit accuracy to minimize roundoff error. $\frac{m}{s}$