Register to reply

Rotation, friction and size (mass/radius?)

by DaceDace
Tags: friction, mass or radius, rotation, size
Share this thread:
Apr24-12, 07:26 AM
P: 1
Basically, I am looking to create a simple physics game in flash for my game design course called "spin the banana" where the player sets the force which is then applied to the banana (imagining the banana is just a disk-shaped object to keep it simple) taking into account the friction and the size of the banana (radius of the disk?).

I'm competent with numbers when given an equation to work with so I just need an equation or set of equations to help me work out the rotation of a spinning object using the friction, size of object and force (and anything else I may need to add in to complete the equations).

Thanks for any help.
Phys.Org News Partner Physics news on
Physicists unlock nature of high-temperature superconductivity
Serial time-encoded amplified microscopy for ultrafast imaging based on multi-wavelength laser
Measuring the smallest magnets: Physicists measured magnetic interactions between single electrons
Apr24-12, 09:12 AM
P: 11,589
Friction between what and what?
Force between what and what, applied where and how long?

If your banana slides on some solid surface (similar to curling), friction can be calculated with the mass, g and a dimensionless constant of the friction. For the momentum, just multiply that stuff, for torque, it might need an integration over the surface of the disk (which has to be done once, afterwards you get some parameter which you can use).

Register to reply

Related Discussions
Does size or mass of a shoe affect its coefficient of friction? Introductory Physics Homework 1
Find the radius of a car tire, given the mass of wedged stone & tire rotation in m/s Introductory Physics Homework 4
Weight dependent on planet size and rotation speed? Astronomy & Astrophysics 1
Size of radius - HELP Advanced Physics Homework 9
Rotation and increasing radius.. General Math 21