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Mini-Quiz: Effect of Sun on Escape Velocity from Earth

by Ron Kurtus (revised 5 November 2011)

Take this Mini-Quiz to check your understanding of the lesson material.



1. Why must the rocket engines be shut off for our calculations?

To prevent overheating when achieving escape velocity

The equation is for freely moving objects

To save fuel in case the rocket starts falling

2. Why is the effect of the Sun measured on the far side of Earth?

That is where the Sun's gravitation is pulling against the rocket motion

Rocket blast-offs are always at night

There is no rotation of the Earth in that area

3. What would happen if the rocket did not attain the combined escape velocity?

It really wouldn't matter, since the rocket was moving upward

The rocket would have to reduce its mass

It might escape Earth but then fall into the Sun

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.


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