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Posted by on Saturday, November 17, 2012 at 5:33pm.

A 1.31-kg block slides across a rough surface such that it slows down with an acceleration of 1.39 m/s2. What is the coefficient of kinetic friction between the block and the surface?

  • Physics - , Saturday, November 17, 2012 at 5:57pm

    I think you solve it like you have the answer to verify? I am no genius in physics...

    Forces in the x direction = friction = mass x acceleration.

    friction forces is found by multiplying the coefficient of friction (u) by the normal force.

    so. -u x mass x gravity = mass x -acceleration

    mass cancels so u = 1.39 / 9.8.

  • Physics - , Saturday, November 17, 2012 at 6:01pm

    atta go Brenda !

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