1. A 1000 kg Click travelling east at a speed of 15 m/s has a head on collision with a 4000 kg Van travelling west at 10 m/s. If the vehicles are locked together after collision, what is their final velocity?
a. -15 kg m/s
b.-10 kg m/s
C. -5 kg m/s
d. 0 kg m/s

2. Is there a change in momentum in both vehicles mentioned in item #45?
a. Yes, there is a change in momentum
b. No change in Momentum
c. Maybe, there is a change in momentum
d. Not sure if there is a change in momentum

3. The 5000 kg final stage of a spaceship ejects the 10,000 kg second stage. Before ejection, the five
stages together travel with a velocity of 200 m/s, if after ejection the second stage travels at 50 m/s
opposite the direction of its initial motion, what is the velocity of the final stage?
a. -50 m/s
b. 50 m/s
C. -700 m/s
d. 700 m/s​