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The 155-kg lunar lander is descending onto the moon's surface with a velocity of 5.5 m/s when its retro-engine is fired. If the engine produces a thrust T for 4.4 s which varies with the time as shown and then cuts off, calculate the velocity of the lander when t - 5.1s 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, negative if up. 5.5 m/s T,N 568 2.2 4.4 t, s Answe: v = i m/s
Transcribed Image Text:The 155-kg lunar lander is descending onto the moon's surface with a velocity of 5.5 m/s when its retro-engine is fired. If the engine produces a thrust T for 4.4 s which varies with the time as shown and then cuts off, calculate the velocity of the lander when t - 5.1s 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, negative if up. 5.5 m/s T,N 568 2.2 4.4 t, s Answe: v = i m/s
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