Chapter 6, Problem 56P

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

Chapter
Section

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

# NASA’s Saturn V rockets that launched astronauts to the moon were powered by the strongest rocket engine ever developed, providing 6.77 × 106 N of thrust while burning fuel at a rate of 2.63 × 103 kg/s. Calculate the engine’s exhaust speed.

To determine
Exhaust speed of an engine.

Explanation

Given Info: Instantaneous thrust of a rocket engine is T=6.77Ã—106Â â€‰N and the rate of change of mass is Î”M/Î”t=2.63Ã—103â€‰kg/s

Formula to calculate the thrust in the rocket engine is,

T=|veÎ”mÎ”t|

• T is the instantaneous thrust of a rocket engine.
• ve is the exhaust speed of an engine.
• Î”M/Î”t is the rate of change of mass.

Rewrite the above expression in terms of ve .

ve=T|Î”MÎ”t| (1)

Substitute 2

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