Question

Problem: Car 1 (1000 kg) is traveling east at 8.0 m/s. Car 2 (2500 kg) is traveling west at 4.5 m/s. These two cars have a head-on collision. Car 2 recoils at 2.0 m/s.

a) what is given/known?

b) What is the linear momentum of Car 1 BEFORE the collision?

c) What is the linear momentum of Car 2 BEFORE the collision?

d) What is the linear momentum of the system ( car 1 and car 2) BEFORE the collision:

e) What is the linear momentum of the system (car 1 and car 2) AFTER the collision:

f) What is the linear momentum of Car 2 AFTER the collision:

g) What is the linear momentum of Car 1 AFTER the collision:

h) What is the velocity of car 1 after the collision?

i) is linear momentum of the system conserved in this collision?

j) is the kinetic energy of the system conserved in this collision? (show this by finding the kinetic energy before and after the collision)

k) What type of collision is this? How can you tell?

L) what is the change in the linear momentum of car 1 (a.k.a. the impulse)

m) what is the change in the linear momentum of car 2

n) if the contact time between the cars during the collision is 0.35 s, what is the average force experienced by car 1 on car 2?

o)if the contact time between the cars during the collision is 0.35 s, what is the average force experienced by car 2 on car 1?

p) compare the average forces and impulse values for car 1 and car 2 (e.g. divide average F for car 1 by average f for car 2)

q) Which of newtons laws is demonstrated by these comparisons above?

Answer 1