Question

A ball with a mass of 1.50 kg travelling +2.00 m/s collides with a stationary ball with a mass of 1.00 kg. After the collision, the velocity of the 1.50 kg ball is +0.40 m/s. What is the velocity of the 1.00 kg ball after the collision?

Select one:

a. - 0.7 m/s

b. + 3.6 m/s

c. + 2.4 m/s

d. + 1.8 m/s

An 18 000 kg freight car travelling 1.75 m/s[E] collides with a 27 000 kg freight car at rest. After the collision, the freight cars stick together. What is the velocity of the freight cars after the collision?

Select one:

a. 0.50 m/s[E]

b. 0.70 m/s[E]

c. 1.00 m/s[E]

d. 2.00 m/s[E]

Answer 1