QA1- KINEMATICSIn the final stages of a moon landing, a lunar module descends under retro-thrust of its descent engineto a height of s = 4 m above the lunar surface where it has a downward velocity of 4 m/s. Calculatethe impact velocity with the moon's surface if:a) The engine is cut off at this point, thereno atmosphere, and lunar gravity is 6 of the earth's9.81gravity (so a =m/s*).6.b) The acceleration under the combined effect of gravity and retro-thrust is the following function ofheight a = s/2.Hint: Acceleration is constant in part (a) but not in part (b). The positive direction is up.

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QA1- KINEMATICS In the final stages of a moon landing, a lunar module descends under retro-thrust of its descent engine to a height of s = 4 m above the lunar surface where it has a downward velocity of 4 m/s. Calculate the impact velocity with the moon's surface if: a) The engine is cut off at this point, there is no atmosphere, and lunar gravity is 6 of the earth's 9.81 gravity (so a = - m/s²). b) The acceleration under the combined effect of gravity and retro-thrust is the following function of height a = s/2. Hint: Acceleration is constant in part (a) but not in part (b). The positive direction is up.

QA1- KINEMATICS In the final stages of a moon landing, a lunar module descends under retro-thrust of its descent engine to a height of s = 4 m above the lunar surface where it has a downward velocity of 4 m/s. Calculate the impact velocity with the moon's surface if: a) The engine is cut off at this point, there is no atmosphere, and lunar gravity is 6 of the earth's 9.81 gravity (so a = - m/s²). b) The acceleration under the combined effect of gravity and retro-thrust is the following function of height a = s/2. Hint: Acceleration is constant in part (a) but not in part (b). The positive direction is up.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

QA1- KINEMATICS
In the final stages of a moon landing, a lunar module descends under retro-thrust of its descent engine
to a height of s = 4 m above the lunar surface where it has a downward velocity of 4 m/s. Calculate
the impact velocity with the moon's surface if:
a) The engine is cut off at this point, there
no atmosphere, and lunar gravity is 6 of the earth's
9.81
gravity (so a =
m/s*).
6.
b) The acceleration under the combined effect of gravity and retro-thrust is the following function of
height a = s/2.
Hint: Acceleration is constant in part (a) but not in part (b). The positive direction is up.

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