When several objects with different masses are dropped by an astronaut on the (airless) Moon...?

.... Moon where these is no air friction, their resultant motions





a) depend on densities of the objects, the one with the highest density falling fastest





b) depend of masses of the objects, the lightest falling fastest





c) depend on the a mases of the objects, the most massive falling fastest





d) are independent of the masses of the objects





a,b,c, or d?When several objects with different masses are dropped by an astronaut on the (airless) Moon...?
the answer is D. i personally like this video of david scott dropping an aluminum hammer and a falcon feather at the same time.


http://nssdc.gsfc.nasa.gov/planetary/ima鈥?/a>When several objects with different masses are dropped by an astronaut on the (airless) Moon...?
I believe the Apollo 15 astronauts (Dave Scott?) proved that a hammer and a falcon's feather dropped at the same rate on the airless moon.





So for objects dropped by a six foot tall astronaut, anyhow, D would be the best answer.
D. Are independent of the masses of the objects.





The idea was first introduced by Galileo Galilei, and he experimented dropping some objects from the Tower of Pisa.
clearly it is d
D, in a vacuum all objects accelerate at the same rate.





http://groups.google.com/group/neat-astr鈥?/a>
d


they hit at the same time


You may find the film on this. One one trip to the moon they made a short movie with a feather and a big rock. They fell at the same rate.
D
d.


In a vacuum all objects will fall at the same rate