Engineering Board Exam Reviewer · Engineering Mechanics · medium
A 6 kg cart moving at 11 m/s collides with and sticks to a stationary 5 kg cart (a perfectly inelastic collision). What is their common velocity immediately after the collision?
- 6
- 13.2
- 5.5
- 0.17
Answer
A. 6
Solution
By conservation of momentum: m1v1 + m2v2 = (m1+m2)vf. (6)(11) + (5)(0) = (11)vf, so vf = 6 m/s.
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