Question

How long will it take for an object to fall from 10m on moon?
The object is on the moon and starts falling from rest. As it is on the moon there is no air resistance to account for. Select your answer from the options below or give your own, make sure it's to the nearest hundredth (x.xx) decimal.

Answer 1

You can solve this using kinematics, particularly with the following equation:

y=.5at2 + v0*t + y0

Here we know the position (-10m) and acceleration (-g from moon, known value). We also know the object starts from rest, so now we have:

-10=-.5gt2

Solving for t, we have

t=sqrt(20/g)

Just remember to use g from the moon


(where that 20 came from? -

Getting rid of the 1/2 from the right side 10/.5 =20)