Recent content by raiderIV

Yep that solved it... Thank you for the correction!

Homework Statement The nominal food-energy value of 1.00g of butter is about 7.20 food calories. If all this energy could be converted completely to mechanical energy, how much butter would be required to power a 65.0kg mountaineer on her journey from Lupine Meadows (elevation 2070m) to the...

The problem is, that the final solution is asking for a set height in meters. I tried plugging in 9.81 for gravity and solving for h and leaving v0 in there, but to no avail (Its a computer system that i need to input the answers to, and it just tells me that the answer does not use v0 in it)...

Homework Statement A solid uniform marble is rolling without slipping when it approaches the base of a hill with a speed v0. Find the maximum height above the base that this marble will reach if the hill is rough enough to prevent slipping. Homework Equations Since there is no...

Your first answer was correct because the moment of inertia for a sphere is 2/5mr2 So you did it correctly, and thanks again ^_^

Yup... I see what i did wrong... in every calculation i did i was thinking cylinder for I instead of sphere. Thank you. And yes I do have to find the KE which turns out to be 1.45J Thanks again for the help, ~John

Homework Statement Calculate the angular momentum of a solid uniform sphere with a radius of 0.120m and a mass of 14.0kg if it is rotating at 6.00rad/s about an axis through its center. Homework Equations Angular Momentum = I * w I = mass*radius2/2 w = 6.00rad/s The Attempt at a Solution When...

Yes i did mean that and i fixed it ^_^ Thank you for the start, I will attempt to handle it from here. ~John

Homework Statement Find the radius R of the orbit of a geosynchronous satellite that circles the earth. (Note that R is measured from the center of the earth, not the surface.) Homework Equations These are what I would assume this equation is going to use. F = GmM/r2 F = mv2/r gravitational...

Ok ok! Its ok everyone! I turned the gravity back on! ^_^ Thank you for the help. I didnt think to add that in there and it worked beautifully ~John

Well i would assume that her velocity is at its maximum when her potential energy is 0, which is at the bottom of the swing. We can figure out her potential energy by using the Conservation of energy and some trig: She hangs 3m from the top of the swing set, therefore we'll set our y-coord 0...

Homework Statement A 50.0kg stunt pilot who has been diving her airplane vertically pulls out of the dive by changing her course to a circle in a vertical plane. If the plane's speed at the lowest point of the circle is 95.0m/s, what should the minimum radius of the circle be in order for...

Thank you for the help you two. I will contact the instructor to see if something was just accidentally omitted. ~John

Homework Statement An automobile air bag cushions the force on the driver in a head-on collision by absorbing her energy before she hits the steering wheel. Such a bag can be modeled as an elastic force, similar to that produced by a spring. Calculate the effective force constant k of the air...

Well if you are given or know the answer (.24), you can reverse the problem from there to find the force that is needed to get that coefficient of friction. ~~(I know that in a normal assignment you won't know the answer, but this is good experience to see what is going wrong on this...