Recent content by acspin

We do need the coefficient of rolling friction to solve the problem. My professor asked me to look at a certain page in my textbook, and there it says: The Coefficient of Rolling Friction is the horizontal force needed for constant speed on a flat surface, divided by the upward normal force...

Really? That's what was given for the rolling friction formula... I tried doing this: Fr = murN Fr = murmg ma = mur mg mur = a/g Would that be correct for the coefficient of friction? I'm just not sure that I'm able to set Fnet equal to the Fr

Homework Statement An airbus A320 jetliner has a takeoff mass of 75,000 kg. It reaches its takeoff speed of 82 m/s in 35 s. What is the thrust of the engines? You can neglect air resistance but not rolling friction. (The force of rolling friction is given by Fr = \mur N Homework Equations...

Wow, I made such stupid mistakes. I'm studying for my final and I'm really dusty on this subject. So, the Normal force is equal to the perpendicular component of the weight vector, thus: N = mg cos \beta Since objects don't accelerate perpendicular to the incline, then I only need to...

Homework Statement Derive the equation for the normal force (N) and the static frictional force (F) in terms of the weight (Mg). \beta is the angle of inclination. Homework Equations http://img62.imageshack.us/img62/5559/normalforcediagram.png The Attempt at a Solution - For N I...

Hi, I'm not sure how to word my question, so I will just state it upfront. What is the importance of \upsilon = \sqrt{2gh} in physics? I've seen it in escape velocity problems, though with an R instead of h. I've seen it with conservation of momentum applications, and it's similar to PE...