Sagot :
Momentum calculations
Total momentum before = 60,000 + 0 = 60,000 kg m/s.
- Because momentum is conserved, total momentum afterwards = 60,000 kg m/s.
- Total mass = mass of carriage A + mass of carriage B = 12,000 + 8,000 = 20,000 kg.
- p = m × v, but we can rearrange this equation so that v = p ÷ m.
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