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Predict/Explain On reentry, the space shuttle’s protective
Chapter 8, Problem 39P(choose chapter or problem)
Problem 39P
Predict/Explain On reentry, the space shuttle’s protective heat tiles become extremely hot. (a) Is the mechanical energy of the shuttle-Earth system when the shuttle lands greater than, less than, or the same as when it is in orbit? (b) Choose the best explanation from among the following:
I. Dropping out of orbit increases the mechanical energy of the shuttle.
II. Gravity is a conservative force.
III. A portion of the mechanical energy has been converted to heat energy.
Questions & Answers
QUESTION:
Problem 39P
Predict/Explain On reentry, the space shuttle’s protective heat tiles become extremely hot. (a) Is the mechanical energy of the shuttle-Earth system when the shuttle lands greater than, less than, or the same as when it is in orbit? (b) Choose the best explanation from among the following:
I. Dropping out of orbit increases the mechanical energy of the shuttle.
II. Gravity is a conservative force.
III. A portion of the mechanical energy has been converted to heat energy.
ANSWER:
Part (a)
Step 1 of 3:
Consider a space shuttle returns back to Earth. As it reenters into the atmosphere, the gases provide a frictional force on the shuttle. The shuttle becomes too hot while returning back. We are going to find the change in the mechanical energy of the shuttle and Earth system.