A lunar lander is powered descent at 100 m above the surface of the moon slows down from a velocity of 20 m/s to 0.5 m/s at constant acceleration. Assume that the lander has a mass of 20,000 kg and that burning the fuel does not change the mass. a) What is the acceleration of the lander? b) How long will it take the lander to change velocity from 20 m/s to 0.5 m/s? c) What is the thrust (T) of the engines?

A lunar lander is powered descent at 100 m above the surface of the moon slows down from a velocity of 20 m/s to 0.5 m/s at constant acceleration. Assume that the lander has a mass of 20,000 kg and that burning the fuel does not change the mass. a) What is the acceleration of the lander? b) How long will it take the lander to change velocity from 20 m/s to 0.5 m/s? c) What is the thrust (T) of the engines?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter7: Gravitation

Section: Chapter Questions

Problem 67A

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