An experimental rocket sled on a level, frictionless track has a mass of 1.4 X 104 kg. It propels itself by expelling gases from its rocket engines at a rate of 10 kg/s, at an exhaust speed of 2.5 × 104 m/s relative to the rocket. For how many seconds must the engines burn if the sled is to acquire a speed of 5.0 X 10¹ m/s starting from rest? You may ignore the small decrease in mass of the sled and the small speed of the rocket compared to the exhaust gas.
An experimental rocket sled on a level, frictionless track has a mass of 1.4 X 104 kg. It propels itself by expelling gases from its rocket engines at a rate of 10 kg/s, at an exhaust speed of 2.5 × 104 m/s relative to the rocket. For how many seconds must the engines burn if the sled is to acquire a speed of 5.0 X 10¹ m/s starting from rest? You may ignore the small decrease in mass of the sled and the small speed of the rocket compared to the exhaust gas.
College Physics
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Chapter1: Units, Trigonometry. And Vectors
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Transcribed Image Text:22. An experimental rocket sled on a level, frictionless
track has a mass of 1.4 × 104 kg. It propels itself by
expelling gases from its rocket engines at a rate of
10 kg/s, at an exhaust speed of 2.5 X 104 m/s relative
to the rocket. For how many seconds must the
engines burn if the sled is to acquire a speed of
5.0 × 10¹ m/s starting from rest? You may ignore the
small decrease in mass of the sled and the small speed
of the rocket compared to the exhaust gas.
Transcribed Image Text:24. Two nuclei undergo a head-on elastic collision. One
nucleus of mass m is initially stationary. The other
nucleus has an initial velocity v and a final velocity of
V
. Determine the mass of the second nucleus in
5
terms of m.
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