Thread: Motion of projectiles

A lunar landing module is descending to the moon's surface at a steady velocity of 10ms^-1.At a height of 120m,a small object falls from its landing gear.Taking the moon's gravitational accleration as 1.6 ms^-2,at what speed,in ms^-1,does the object strike the moon?

Originally Posted by srirahulan

A lunar landing module is descending to the moon's surface at a steady velocity of 10ms^-1.At a height of 120m,a small object falls from its landing gear.Taking the moon's gravitational accleration as 1.6 ms^-2,at what speed,in ms^-1,does the object strike the moon?

1. Determine the time from the distance:



with

You should come out with t = 7.5 s

2. Use the value of the time to determine the final velocity:



You should come out with