Recent content by scioly

Hmm...not really. 1) We're assuming here that this 1/2 mol block of air is the ONLY air in the system. 2) The point is how this extra force translates into more momentum, which then translates into the object being able to travel faster, and how the only reason it has a greater velocity is...

This is the response that I got from a friend (edited a little): Let's say that we have two masses. One is 1 kg, and the other is 2 kg. Assume that they have the same surface area, and surface, so the air resistance is the same. F = ma. For the 1 kg object the force is 9.81 N, and for the...

Larger shaped bodies of equal weight would be those bodies that have more surface area; therefore, they'd fall slower because more air particles are bouncing of them (more air resistance/drag) And when the weight is increased... F = m * a The acceleration due to gravity remains constant, but...

Oh...that's opposite from what I thought. Wikipedia says: "In fluid dynamics, drag (sometimes called air resistance, a type of friction, or fluid resistance, another type of friction) refers to forces acting opposite to the relative motion of any object moving with respect to a surrounding...

Hi CWatters, I tried googling drag force, but it didn't help me much. It had a bunch of stuff about the shape of the object and the flow around it. I found this: F = 0.5 C ρA V2 A = Reference area in m2. C = Drag coefficient, unitless. F = Drag force, N. V = Velocity, m/s. ρ =...

Wait...is the force of gravity dependent on mass? I remember this equation: F = mg This would seem to say that ALTHOUGH gravity is constant, the total gravitational force on an object is dependent on its mass. I don't get why, and I can't reconcile this in my mind with Galileo's experiments...

Net force = Force of gravity - Force of air resistance and gravity: not dependent on mass/velocity of object air resistance: dependent on terminal velocity of object (because as terminal velocity increases, the drag forces decrease (i. e. air resistance decreases)) But why do the drag forces...

Net force on falling object downwards = (Force downwards) - (Force upwards) So: Net force = gravity's force (not dependent on mass) - air resistance's force (dependent on mass) I still don't get it :(

OK, so W = m.g weight = mass X gravity Force of gravity remains constant (9.8 m/s not thinking about air resistance), so as the mass of an object (amount of "matter" in the object) increases, the weight of the object will increase as well.

I'm taking AP Chem this year, so I'm interested in what's happening at the molecular level too (and I should be able to understand, if you want to use those sorts of examples)

OK, so here's another way I was thinking about it: Assume air to be a fluid, and the coffee filter with or without paperclips to be a denser object moving through the fluid. As the density of the object increases (i. e. more paperclips in filter) the object moves faster. However, this effect...

So F = ma and this force isn't "constant" like gravity? So then as the mass is increased, the upwards force of the air resistance will increase? No, that can't be right...I'm getting something wrong. As F is increased, ma will increase as well in order for F to be equal to ma. Therefore, if m...

And terminal velocity is when the force upwards (air resistance) equals the force downwards (gravity) So I think it's established that the downwards force remains constant (Galileo's experiments). It has to be the upward force of air resistance then.

Wait...no...I was wrong. The force downwards is constant (gravity) So we have an increase in mass, but downwards force (gravity) remains constant. So it's: F/m = a meaning that as the mass increases, with a constant downwards force of gravity (9.8 m/s free fall) the acceleration decreases...

So as the mass increases, the force downwards increases as well?