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Physics, 04.05.2021 19:20 softballlover487

A large truck of mass 4M is traveling at a speed of V when it collides with a small car of mass M that is at rest. The truck and car stick together after the collision. When the truck and car stuck together after the collision, the speed of the center of mass of the truck-car system is Vf. If the truck and car have an elastic collision, the speed of the center of mass of the truck-car system is Vf2. Which of the following expressions for Vf2 must be true? a. 4/5 V
b. 1/5 V
c. V
d. 5/4 V
e. 5V

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