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Q1. A cup of coffee is sitting on the table in an airplane which is flying at a constant altitude and a constant velocity. The coefficient of static friction between the cup and table is 0.30. Suddenly the plane accelerates its altitude remaining constant. Determine the maximum acceleration which the plane can have devoid of the cup sliding backward on the table?

Q2. There is a clever kitchen gadget for the drying lettuce leaves after you wash them. It comprises of a cylindrical container mounted so that it can be rotated regarding its axis by turning a hand crank. The outer wall of the cylinder is perforated with the small holes. You put the wet leaves in the container and turn the crank to spin off the water. The radius of the container is 12cm. whenever the cylinder is rotating at 2.0 revolutions per second, then find out the magnitude of the centripetal acceleration at outer wall?

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