Rockets - Part 1.

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The following three questions refer to the material you were to read in preparation to the lesson. Questions one and two require you to write a three or four sentence response. Number three is a multiple choice question. Click in the appropriate circle.

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1.

Suppose you want to use the conservation of momentum equation dm/dt ve = m dv/dt to calculate the amount of fuel burned by a rocket during a time interval dt. What would you have to know about the rocket? Would that be a simple calculation for a model rocket? How about a huge intercontinental missile? (Remember: ve is the exhaust velocity of the rocket and m is the mass of the rocket.)



2.

The space shuttle on the launch pad has a mass of about 2 million kg. Its acceleration at take-off is about 8 m/s2. The exhaust velocity of the propellant gases is about 4000 m/s. Estimate how much fuel (in kg) it burns during the first second.



3.

At some point during the shuttle flight, the booster tank SEPARATES from the craft. When the connection between the two objects is severed, the velocity of the shuttle

increases

decreases

remains unchanged

the answer depends on the mass of the booster


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