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A block is placed on a 5 meter tall frictionless incline of 30 degrees. Assuming the block starts from rest, how long will it take

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A block is placed on a 5 meter tall frictionless incline of 30 degrees. Assuming the block starts from rest, how long will it take to reach the bottom? A ball of mass 7 kg is kicked with an initial velocity of 28 m/s at an angle of 60 degrees. What is the ball's kinetic energy at it's highest point

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