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77. A particle, starting from point A in the drawing, is projected down the curved runway. Upon leaving the runway at point B, the

77. A particle, starting from point A in the drawing, is projected down the curved runway. Upon leaving the runway at point B, the particle is traveling straight upward and reaches a height of 4.00 m above the floor before falling back down. Ignoring friction and air resistance, find the speed of the particle at point A. 4.00 m - + 4 3.00 m

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