Glennb said:
Um...wrong
Gravity is a force that acts on all bodies at all times whether moving or at rest. Also force has nothing to do with momentum.
Glennb B.Sc. (pedant)
You are correct about gravity, but in the context the speed at which two objects fall is dependent on their initial velocities. Actually momentum has a lot to do with it because initial momentum affects the tendency of a body to fall.
Force and momentum have nothing to do with eachother, wtf!!!
Maybe when a projectile(lets say a brick) is travelling along through the air (has mass therefore momentum as well)and it hits you in the head, the force that the brick exerts on you may actually cause some damage!!!
Force and momentum are related by Newtons 2nd and 3rd laws!!!
look 'em up!!!
Slappy B.Sc, M.Sc. PhD (in progress)[/quote]
Ordinarily Slappy, I'd defer to your longer initials ;-) but not this time. from my hazy memory, momentum = mass * velocity
Force = Mass * acceleration
so if something is travelling at constant velocity (ie no acceleration) there is no force acting on it (Newtons first law .....look it up ;-) ) but the object still has momentum.
When the brick hits you in the head there is a force exerted each way due to the decelleration from initial velocity to zero.
Who'da thunk a physics debate in here.
Glennb[/quote]
You are a pedantic, but force and momentum are related when we are talking about collisions, and this is what the original topic is about.
In a collision the momentum mv has been transferred a force. I'd call that related!!!
My brick anlogy is the same as yours, just because I didn't mention the word decelleration you are getting bent out of shape!!