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Chapter D3, Problem 03/149 The 222-kg lunar lander is descending onto the moon's surface with a velocity of 4.3 m/s when its retro-engine is fired. If the engine produces a thrust T for 5.8 s which varies with the time as shown and then cuts off, calculate the velocity of the lander when t - 6.7 s assuming that it has not yet landed. Gravitational acceleration at the moon's surface is 1.62 m/s? The velocity is positive if moving downward,...

• ### Chapter D3, Problem D3/140 The 188 g unar lander is descending nnta he mnon's surfan with...

Chapter D3, Problem D3/140 The 188 g unar lander is descending nnta he mnon's surfan with a velac y of 6 m 尿when its re o engine ts fired f the engine producas a thrust T or 3.2昴which varies with the that it has not yet landed, Gravitational acceleration at the moon's surface is 1.62 m/s, The velocity is positive if moving downward, negative If up, me as shown and then cuts o calculate the velocity the lander when t...

• ### A lunar lander is descending toward the moon's surface. Until the lander reaches the surface, its...

A lunar lander is descending toward the moon's surface. Until the lander reaches the surface, its height above the surface of the moon is given by y(t)=b−ct+dt^2 , where b = 710m is the initial height of the lander above the surface, c = 64.0m/s, and d = 1.03 m/s^2. (A) What is the initial velocity of the lander, at t = 0? (B) What is the velocity of the lander just before it reaches the lunar surface?

• ### The Apollo Lunar Module was used to make the transition from the spacecraft to the moon's surface and back.

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