What speed does the boxcar have after 15 seconds
A boxcar of mass 600 tons at rest becomes uncoupled on a 5.00 grade. If the track is considered to be frictionless, what speed does the boxcar have after 15 seconds?
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3.50×1023 nitrogen molecules collide with a 15.0 wall each second. Assume that the molecules all travel with a speed of 410 and strike the wall head on. What is the pressure on the wall?
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A toy train rolls around a horizontal 1.7--diameter track. The coefficient of rolling friction is 0.10. What is the magnitude of the train's angular acceleration after it is released? (found) How long does it take the train to stop if it's release
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