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August 31, 2015

Homework Help: physics

Posted by Nancy on Friday, October 16, 2009 at 9:06pm.

An object slides down a inclined surface in the presence of kinetic friction forces.
At the given inclination the kinetic friction force is found to be of magnitude 90 N.
Now, the angle that the surface makes with respect to the horizontal is increased and the object continues to slide down the surface.
The magnitude of the new kinetic friction force present will be ... ?


I think that it should be smaller than 90N because if you think about it logically an increased angle would make the slope steeper, and things fall faster down steeper slopes which means that the friction force decreases; however i know that this is not really a valid explanation.

Could someone five a better explanation?

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