Posted by **squires** on Friday, September 16, 2011 at 7:39pm.

There are Two boxes on top of each other. The top has a mass of 2.99kg the bottom one has a mass of 7.89 kg. A horizontal force of 39.97 newtons is applied to the left to move them both at an acceleration of 1.42m's^2

Find the minimum coefficient of static friction μt between the blocks such that the 2.99 kg block does not slip under an acceleration of 1.42 m/s2.

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