Question

a heavy car A of mass 2000kg tralling at 10m/s has a head-on collision with a sports car B of mass 500kg.if both cars stop deadon colliding what was the velocity of car B?

Answer 1

$hello$

the answer is 40m/s.

Hope it is helpful

m1 (car A) =2000kg

m2(carB)=500 kg

v1 (car before impact) = va

v1(car after impact)=0

v2( car before impact)=vb

V2( car after impact) =0

2000×va+500×vb=0

2000×10+500vb=0

vb=20000/500=40m/s