7. Two blocks with masses 4.00 kg and 8.00 kg are connected by a string and slide down a 30.00 inclined plane. The coefficient of kinetic friction between the 4.00 kg block and the plane is 0.25; that between the 8.00-kg block and the plane is 0.35 a) Calculate the acceleration of each block. b) Calculate the tension in the string. c) What happens if the positions of the blocks are reversed, so the 4.00-kg block is above the 8.00-kg block? 3.00 4.00

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!