Question

for a rifle of mass 4kg a bullet of mass 50g. is fired with an initial velocity of 35ms-1 calculate the initial recoil velocity of the refil

Answer 1

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Answer 2

$hey \: mate \\ \\ here \: is \: ur \: ans \\ \\ mass \: ofbullet \: m1 = 0.05kg \\ \\ massof \: rifle \: is4kg{kg} \\ \\ initial \: velocity \: of \: bullet \: u1 = 0 \\ initial \: velocity \: of \: rifle \: u2 \: = 0 \\ \\ final \: velocity \: of \: bullet \: =v1 = 35 \\ \\ final \: velocity \: of \: \: rifle \: v2 = \\ \\ acc \: to \: law \: of \: conservation \: of \: mass \ \\ \\ m1v1m2v2 = m1u1m2u2 \\ \\ 0.05 \times 35 + 4v2 = 0 + 0 \\ \\ v2 = - 0.05 \times 35 \div4 \\ \\ = - 7 \div 16 \\ = - 0.04ms - 1 \\ \\ - ve \: sign \: shows \: that \: direction \: in \: which \: refil \: recoil \: is \: opposite \: to \: that \: bullet$