Recent content by jff0404

1. After dropping coffee filters, I have to derive or describe the relationships between air Resistance(R) and v or v^2, whichever is right, and draw a graph. I can find derivations on internet as long as I site. I have time, v, height and acceleration, but no reference area. All the equations...

Yes, I got it now, that was exactly the answer. Thank you all, especially bossman27!

You're right! Thank you.

So the static Ff is 50N at rest? Then what's the maximum static Ff? And even if the box moved, the kinetic friction force would be 25N which is still less than 20N so it can't accelerate (I think). Could somebody at least tell me if the "right answer" is correct? If it is, I still have to show...

1. Homework Statement A plane is traveling north at 200 meters/second; a wind blows from the west and accelerates the plane at 15m/s^2. If the wind lasts 10 seconds what is the plane's new velocity? 2. Homework Equations velocity = acceleration*time 3. The Attempt at a Solution v =...

So the box wouldn't move because 50N static Force of friction is greater than the 20N pushing force? That's what I put and I got the wrong answer. I mean, the static friction isn't causing the box to move in the other direction..

Ummm... the box would move to the direction of 50N force?

The right answer choice was "the crate will accelerate across the floor at 3m/s^2." But at could be wrong because that was my friend's answer, and we might have different versions.

1. Homework Statement [/b] A box weighing 100N is at rest on a horizontal surface. The coefficient of static friction between the box and the surface is 0.5, and the coefficient of kinetic friction is 0.25. If the crate is pushed with a force of 20N parallel to the floor, which of the following...