Powered across a level track by a jet engine
In the 1950s, an experimental train that had a mass of 2.30 104 kg was powered across a level track by a jet engine that produced a thrust of 5.30 105 N for a distance of 509 m. Unless otherwise directed, assume that air resistance is negligible.
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A .280 kg croquet ball makes an elastic head on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. What is the mass of the second ball? What fraction of the original kinetic en
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At a baseball game, a radar gun measures the speed of a 146 g baseball to be 137.32 ± 0.10 km/h. (a) What is the minimum uncertainty of the position of the baseball?
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