Homework Help: Physics - please help

Posted by Sejul on Saturday, January 28, 2012 at 8:52am.

A 3.70kg box is sliding across the horizontal floor of an elevator.
The coefficient of kinetic friction between the box and the floor is 0.470.
Determine the kinetic frictional force that acts on the box when

(a) The elevator is stationary.

(b) The elevator is accelerating upward with an acceleration whose magnitude is 2.90 m/s2.

(c) The elevator is accelerating downward with an acceleration whose magnitude is 2.90 m/

Physics - please help - Damon, Saturday, January 28, 2012 at 8:58am
a) .47 * 3.7 * 9.8

b) .47 * 3.7 * (9.8 + 2.9)

c) .47 * 3.7 * (9.8 - 2.9)
Physics - please help - Sejul, Saturday, January 28, 2012 at 9:52am
Thank you so much for your help.

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