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12.22 Para transportar una serie de bultos de tejas A hasta el techo, un contratista utiliza un montacargas motorizado compue

To transport a series of packages of roof tiles A to the roof, a contractor uses a motorized lift truck consisting of a horizontal BC platform that is mounted on the rails attached to the sides of a ladder. The forklift begins its movement from rest, at first it moves with a constant acceleration a1 as shown in the figure. Then it decelerates at a constant rate a2 and stops at D, near the top of the ladder. If it is known that the coefficient of static friction between the bundle of tiles and the horizontal platform is 0.30, determine the maximum allowable acceleration a1, and the maximum permissible deceleration a2 if the package should not slip on the platform.

To transport a series of packages of roof tiles A to the roof, a contractor uses a motorized lift truck consisting of a horizontal BC platform that is mounted on the rails attached to the sides of a ladder. The forklift begins its movement from rest, at first it moves with a constant acceleration a1 as shown in the figure. Then it decelerates at a constant rate a2 and stops at D, near the top of the ladder. If it is known that the coefficient of static friction between the bundle of tiles and the horizontal platform is 0.30, determine the maximum allowable acceleration a1, and the maximum permissible deceleration a2 if the package should not slip on the platform.
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