momentum before = momentum after
1300 * 2 + 400 * 0 = 1700 v
v = 1300 * 2 / 1700
v = 1.5 m/s
Guide me through this plz.
A single 1,300 kg cargo train car is rolling along a train track at 2.0 m/s when 400 kg of coal is dropped vertically into it. What is its velocity right afterward? Assume a closed system.
(Points : 1)
1.5 m/s
2.0 m/s
6.5 m/s
0.0011 m/s
3 answers
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