A $0\mathrm{.}04$ kg bullet is fired from

a rifle that is clamped to a trolley. The

combined weight of the rifle and the trolley

is $10$ kg$.$ After firing, the velocity of the

trolley is known to be V

a

$=1\mathrm{.}5$ m$/$s to the

left.

$1.$ Determine the velocity of the bullet

after firing.

$2.$ Determine

the

muzzle

velocity

$($velocity of the bullet relative to the

barrel$-$of the rifle$)$