What indicates if object will be reflected - certain example

• July 27th, 2014, 07:10 PM
fghf76
What indicates if object will be reflected - certain example
If I throw a small rock(1kg) at a big rock(100kg) the small rock is reflected; Let's say my weight is 80kg - if I would jump into a big rock instead of being reflected I would move in the same direction as a big rock. The big rock is heavier but it is not reflecting me - Why is that?
• July 27th, 2014, 07:30 PM
pzkpfw
A lot of it's going to do with the properties of the objects; not just their mass.

Drop a 1 kg rubber ball onto concrete, or a 1 kg rock onto concrete - you'll get different results.
• July 27th, 2014, 08:27 PM
Dywyddyr
Or 1kg of silly putty.
A human isn't a "rigid" object.
Therefore the collision is inelastic.
(You might also want to take a look at Coefficient of restitution).
• July 27th, 2014, 09:09 PM
shlunka
Quote:

Originally Posted by pzkpfw
A lot of it's going to do with the properties of the objects; not just their mass.

Drop a 1 kg rubber ball onto concrete, or a 1 kg rock onto concrete - you'll get different results.

holy hell I love that kitten.
• July 31st, 2014, 03:29 PM
fghf76
So for a less mass object not being reflected after hitting greater mass object the collision must be always inealstic? Does the shape of an object indicates (partially) collision type ? (I mean to be more elastic or inelastic?)

EDIT: I wonder if the human body in this example(80kg) would be made of steel, would it be reflected instead