Question

two cars A & B, before they collide.



B A

car B of mass 1200 kg, is stationary. Car A, of mass 2000 kg, is traveling towards car B at 18m/s
the cars collide & car B experiences an impulse. Car A continues to move in the same direction, with a momentum of 21 000 kg m/s
calculate the momentum of car B immediately after the collision

Answer 1

By conservation of Momentum:

$M_{A}$ * $V_{Ai}$ + $M_{B}$ * $V_{Bi}$ = $M_{A}$ * $V_{Af}$ + $M_{B}$ * $V_{Bf}$

$M_{A}$ = 2000 Kg

$M_{B}$ = 1200 Kg

$V_{Ai}$ = 18 m/sec

$V_{Bi}$ = 0 m/sec

$M_{A}$ * $V_{Af}$ = 21000 Kg m/sec

$M_{B}$ * $V_{Bf}$ = ?

Putting all the values in above equation, we get:

$V_{Bf}$ = 12.5 m/sec....<<<<Answer.

I Hope this will Help You.