Question

Two 125 kg bumper cars are moving toward each other in opposite directions. Car X is moving at 10 m/s and Car Z at –12 m/s when they collide head–on. If the resulting velocity of Car Z after the collision is 10 m/s, what is the velocity of Car X after the collision?

–12 m/s

–10 m/s

10 m/s

12 m/s

Answer 1

if mass of both cars are equal and collision is considered to be elastic collision then
after collision velocities and directions of cars will exchange in simple words

Answer 2

im confused ?

Answer 3

speed of car x would be -12

Answer 4

oh ok thank you how did you get that ?