A student is trying to determine the maximum rate at which a truck can accelerate to the right without causing the 70kg box sliding off the back of the truck. The coefficient of static friction between the box and the truck bed is 0.64 and the coefficient of kinetic friction is 0.44. Neglect drag. Answer each of the following questions for the case in which the truck is accelerating as quickly as possible without causing the box to slide. How many forces are acting on the box? BARNHART What direction is the friction on the box? right Is the friction static or kinetic? static What is the magnitude of frictional force on the box? 439 What is the magnitude of the net force on the box? What is the magnitude of box's acceleration? m/s2

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