posted by anny on .
Suppose an astronaut drops a feather from 1.4 m above the surface of the Moon. If the acceleration due to gravity on the Moon is 1.62 m/s2 downward, how long does it take the feather to hit the Moon's surface?
Ignore air resistance, which is justifiable in an insignificant atmosphere.
a=acceleration du to gravity=-1.62 m/s/s
S=displacement = -1.4 m (downwards)
t=time in seconds
-1.4 = 0*t + (1/2)(-1.62)t²