Mass of block A is 30 kg and mass of wedge b is 5kg. the coeeficient of friction between all contact surfaces is .28. 1. Force p that is necessary to push wedge b to the left? 2. the reaction between block a and wedge b? 3. the reaction between wedge b and horizontal plane

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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!