The 222-kg lunar lander is descending onto the moon's surface with a velocity of 4.5 m/s when its retro-engine is fired. If the engine produces a thrust T for 4.2 s which varies with the time as shown and then cuts off, calculate the velocity of the lander when t = 5.3 s assuming that it has not yet landed. Gravitational acceleration at the moon's surface is 1.62 m/s². The velocity is positive if moving downward, negative if up. 4.5 m/s 844 T. N 2.1 4.2 t, s Answe: v= i m/s

The 222-kg lunar lander is descending onto the moon's surface with a velocity of 4.5 m/s when its retro-engine is fired. If the engine produces a thrust T for 4.2 s which varies with the time as shown and then cuts off, calculate the velocity of the lander when t = 5.3 s assuming that it has not yet landed. Gravitational acceleration at the moon's surface is 1.62 m/s². The velocity is positive if moving downward, negative if up. 4.5 m/s 844 T. N 2.1 4.2 t, s Answe: v= i m/s

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

5th Edition

ISBN:9781305084766

Author:Saeed Moaveni

Publisher:Saeed Moaveni

Chapter8: Time And Time-related Variables In Engineering

Section: Chapter Questions

Problem 24P

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