THe coefficient of rolling friction is 0.02, then what force is needed to keep a 5 kg ball rolling at a constant speed on a horizontal surface

i know to use gravity, 9.8 m/s^2

please help me with this one.

thankyou.

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- June 5th 2007, 02:44 PMrcmangorolling friction
THe coefficient of rolling friction is 0.02, then what force is needed to keep a 5 kg ball rolling at a constant speed on a horizontal surface

i know to use gravity, 9.8 m/s^2

please help me with this one.

thankyou. - June 6th 2007, 05:12 AMtopsquark
- June 6th 2007, 10:07 AMJhevon
- June 6th 2007, 10:38 AMtopsquark
Sorry! I guess I wrote that for only the original poster, didn't I?

where

is the force of friction

is the coefficient of rolling friction (typically much less than the coefficient of kinetic friction.)

and

N is the normal force on the object between the pair of surfaces inducing the friction.

-Dan