Question

The 15200 -kg lunar lander is descending onto the moon's surface with a velocity of $2 \mathrm{m} / \mathrm{s}$ when its retro-engine is fired. If the engine produces a thrust $T$ for 4 s which varies with time as shown and then cuts off, calculate the velocity of the lander when $t=5$ s, assuming that it has not yet landed. Gravitational acceleration at the moon's surface is $1.62 \mathrm{m} / \mathrm{s}^{2}$.

          The 15200 -kg lunar lander is descending onto the moon's surface with a velocity of $2 \mathrm{m} / \mathrm{s}$ when its retro-engine is fired. If the engine produces a thrust $T$ for 4 s which varies with time as shown and then cuts off, calculate the velocity of the lander when $t=5$ s, assuming that it has not yet landed. Gravitational acceleration at the moon's
surface is $1.62 \mathrm{m} / \mathrm{s}^{2}$.

Added by Alfredo H.

University Physics with Modern Physics

Hugh D. Young 14th Edition

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Solved by Expert Suman K

07/04/2022

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The 15200 -kg lunar lander is descending onto the moon's surface with a velocity of $2 \mathrm{m} / \mathrm{s}$ when its retro-engine is fired. If the engine produces a thrust $T$ for 4 s which varies with time as shown and then cuts off, calculate the velocity of the lander when $t=5$ s, assuming that it has not yet landed. Gravitational acceleration at the moon's surface is $1.62 \mathrm{m} / \mathrm{s}^{2}$.