413,927 views
7 votes
7 votes
BEFORE COLLISION

MASS = 4200 kg
MASS = 990 kg
V = 10 m/s
AFTER COLLISION
V = ?
V = 2 m/s
What is the velocity after the crash?

User Ernist Isabekov
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2.9k points

2 Answers

11 votes
11 votes

Initial kinetic energy KE = 1/2 m1v12 + 1/2 m2v22 = joules. The following calculation expects you to enter a final velocity for mass m1 and then it calculates the final velocity of the other mass required to conserve momentum and calculates the kinetic energy either gained or lost to make possible such a collision.

User Thar
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2.6k points
20 votes
20 votes

Anyways the answer is x=2
User Abdulmalek Dery
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2.1k points