A shunting locomotive provides impulse of 40kN to set motion a stationary 8 tones wagon which then moves off freely at velocity u against a track resistance of 60N/tone and finally reaches a velocity v after 20 seconds. Find the values of u and v.
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Expert's answer
2020-06-01T13:10:18-0400
"p=40 kN\\cdot s"
"p=m\\cdot u \\to""u=\\frac{p}{m}=\\frac{40000}{8000}=5m\/s"
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Comments
In calculating retardation, I feel like the units won't eventually lead to m/sec^2
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