# C5 - intersection The car and the van stick together after...

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C5: Applying Conservation of Momentum

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A 10000 kg rocket explodes as it is taking off from the earth. An explosion causes a piece of mass 2000 kg to be ejected downward. Before the explosion the rocket was going up at 5 m/s, and afterward it is going up at 8 m/s. If the explosion lasts approximately 0.01 s, how accurate is it to treat the rocket as an isolated system? What is downward speed of the 2000 kg piece if we treat the rocket as an isolated system?
A rocket of mass 10000 kg has an engine that emits rocket fuel at a rate of 150 kg/s with an ejection speed of 80 m/s. What acceleration does this give the rocket?

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A 5000 kg van collides with a 2000 kg car at a 45° angle in an
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Unformatted text preview: intersection. The car and the van stick together after the collision. The wreck is observed to be moving at 10 m/s in a direction of 20 degrees from the initial direction of the van. How fast was the van moving before the collision? Concept Test Two particles move toward each other as shown above. The particles may or may not have the same mass. Given only this information, which of the following Fnal states is incompatible with conservation of momentum? The length of the arrows is proportional to the speed of each particle. 5. All are compatible 6. All are incompatible 1. 2. 3. 4....
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C5 - intersection The car and the van stick together after...

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