to find the total you add, not subtract.
first car = 15480 yes
second car = -20160 so disagree
p = 15480-20160 = - 4680
total mass = 1700 kg
1700 v = -4680
v = - 2.75 m/s
(1/2)860(18^2)+(1/2)840(24^2)-(1/2)(1700)(2.75)^2
Two cars are on a collision course. One is going right 18 m/s and has a mass of 860kg. The other is going left at 24 m/s and has a mass of 840 kg.
1. Find the total initial momentum of the two cars
For this question I did
first car: 860(18) = 15480
second car: 840(-24) = -15480
15480 - - 15480 = 36000 N•s
2. The cars collide and stick to each other. Find the velocity immediately after the collision.
3. What's the change in kinetic energy of the two-car system?
1 answer