Question

Two toy cars with masses of 0.70 kg and 0.30 kg, respectively, move towards each other and collide head-on and then stick together.. The magnitude of the initial velocity for each of of the toy cars is 15.0 m/s. What is the speed of the toy cars immediately after collision?

Answer 1

15m/s

Step-by-step explanation:

using the principles of perfect inelastic collisions...momentum before=momentum after and that in the momentum after collision the masses combine hence calculate momentum before by getting of each car respectively= (0.7 x 15 +0.3 x15) which is equivalent to 15 .in momentum after the total mass is 1 and velocity replaced by an unknown eg v.15=1v hence the common velocity is 15