Posted by nm on Tuesday, March 8, 2011 at 8:09pm.
the force that are acting on the box are1)normal force, gravational force, horizontal force, friction force. If you want to find the a, use the eq of new ton laws. F=MA. For the force you need to add friction force and horizontal force. But you dont know the mass of the object. So u need to find the mass by N-mg=0. After that plug in mass in the first eq and solve it. GOOD LUCK.
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