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Unreasonable Results (a) What is the initial acceleration
Chapter 4, Problem 39(choose chapter or problem)
Problem 39PE
Unreasonable Results (a) What is the initial acceleration of a rocket that has a mass of 1.50×106 kg at takeoff, the engines of which produce a thrust of 2.00×106 N ? Do not neglect gravity. (b) What is unreasonable about the result? (This result has been unintentionally achieved by several real rockets.) (c) Which premise is unreasonable, or which premises are inconsistent? (You may find it useful to compare this problem to the rocket problem earlier in this section.)
Questions & Answers
QUESTION:
Problem 39PE
Unreasonable Results (a) What is the initial acceleration of a rocket that has a mass of 1.50×106 kg at takeoff, the engines of which produce a thrust of 2.00×106 N ? Do not neglect gravity. (b) What is unreasonable about the result? (This result has been unintentionally achieved by several real rockets.) (c) Which premise is unreasonable, or which premises are inconsistent? (You may find it useful to compare this problem to the rocket problem earlier in this section.)
ANSWER:
Solution 39PE
Step 1 of 6
In the given problem, a rocket with mass takes off with initial thrust of
produced by the engine. Here we need to calculate the initial acceleration of the rocket. Also, we need to comment and compare the result in the real case. The problem can be solved using Newton’s laws of motion.