1.

A lunar landing module is descending toward the moon's surface at a steady velocity of 10 ms. At a height of 120 m, a small objects falls from its landing gear. Taking the moon's gravitational acceleration as 1.6 ms , at what speed (in ms) does the object strike the moon ?

Answer»

202
22
19.6
16.8

Solution :Here `V^(2)-10^(2)=2xx1.6xx120`
or `v^(2)=484` andv=22 m


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