- #1
zmike
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A perfect uniform sphere is thrown horizontally on to the floor. It slides on the floor then it begins rollings soon after. Draw a complete FBD and diagram for the motion before and after the rolling.
->My problem is does the kinetic friction act in the same direction as the balls motion or opposite to it BEFORE it begins to roll?
->Do I draw kinetic friction acting on the center of the mass of the ball BEFORE it rolls? or does it only act on the bottom edge of the ball?
it seems to me that friction can only act on the bottom but in previous units in the textbook, friction appears to act on the center of mass?
please reply. thanks
->My problem is does the kinetic friction act in the same direction as the balls motion or opposite to it BEFORE it begins to roll?
->Do I draw kinetic friction acting on the center of the mass of the ball BEFORE it rolls? or does it only act on the bottom edge of the ball?
it seems to me that friction can only act on the bottom but in previous units in the textbook, friction appears to act on the center of mass?
please reply. thanks