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Well I was wondering, if the velocity stays the same, say goes at five hundred m/s constantly.

Then does that mean that it has no force, since it has no acceleration...? I mean, you are still moving at 500m/s, so how can that have no force?

Please Explain

2007-08-07 12:45:32 · 6 answers · asked by xblah900x 1 in Science & Mathematics Physics

6 answers

An object undergoing zero acceleration will have no net force acting on it. This is not quite the same as saying that no force at all is acting on the object; there might in fact be forces acting on it but the forces all cancel out insofar as their effect on the velocity of the object. Real moving objects usually come to rest because of unbalanced forces acting on it - frictional forces from rubbing or sliding on a solid surface, viscous and turbulent drag from moving through a liquid or gas, that sort of thing. To keep objects moving in an everyday environment, these frictional and drag forces must be counterbalanced by some kind of motive force to make the net force zero.

2007-08-07 13:17:32 · answer #1 · answered by devilsadvocate1728 6 · 2 0

You ask, ". . . you are still moving at 500m/s, so how can that have no force?"

This seems confusing since it seems counter to our experience: we know we must constantly pedal to keep a bicycle moving at the same speed.

The reason is that the NET force is zero for there to be no acceleration. Usually there is some form of drag in everyday motion, so we must APPLY a force in order to make the NET force, the sum of the drag and force applied, equal to 0.

2007-08-07 20:04:10 · answer #2 · answered by supastremph 6 · 1 0

That's not true!!?!!
The total of forces applying on considering is zero.
Like when you push the wall; thee is no movement so as acceleration but you can see that you sweat!!!!!!So there are forces but the total is zero.

2007-08-07 20:02:37 · answer #3 · answered by amir a 2 · 1 0

there's no force because of the equation F=ma with f = force, m = mass, and a = acceleration. so if a equals zero then there's no force

2007-08-07 19:55:10 · answer #4 · answered by abchawaiixyz 1 · 0 1

Exactly theres no force and you won't feel a thing, because if you were blindfolded, you would have no idea whether you were moving or standing!
Do you feel like you're moving when you're in an airplane and its moving constantly? No, but you sure will feel it when its accelerating and decelerating.

2007-08-07 19:51:06 · answer #5 · answered by Anonymous · 1 1

well it depends if there is friction or not.
in a frictionless environment, yes, there would be no force.
But in our world, you would need some force to keep the object at a constant velocity.

2007-08-07 20:29:55 · answer #6 · answered by sur2124 4 · 1 0

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