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    A particle is sliding with acceleration 3 down a line of greatest slope of a fixed plane. The plane is inclined at 40 degrees to the horizontal.

    Calculate the coefficient of friction between the particle and the plane.

    I tried drawing a diagram and found that you haven't got the mass or the driving force when I tried to calculate, so I couldn't rearrange. Also I tried to cancel out the masses but you can't do that for the normaL and still leaves you with the driving force. Any ideas?

    Thanks
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    There is no "driving force". It is sliding under gravity. Call the mass m.
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    if it helps you can let the mass be 1 kilogram
 
 
 
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Updated: March 31, 2013
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