Homework Help: 11 grade physics

Posted by Cameron on Sunday, November 14, 2010 at 3:42pm.

A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.24 and the push imparts an initial speed of 4.2 m/s?

11 grade physics - drwls, Sunday, November 14, 2010 at 6:22pm
It will travel a distance X such that:
Work done against friction = Initial kinetic energy

Uk*M*g*X = (1/2)MVo^2
X = Vo^2/(2*Uk*g*)

Uk is the kinetic friction coefficient.

Note that the mass M cancels out.

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