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The figure shows an initially stationary block of mass m on a floor. A force of...

The figure shows an initially stationary block of mass m on a floor. A force of magnitude 0.500mg is then applied at upward angle θ = 20°. What is the magnitude of the acceleration of the block across the floor if (a) μs = 0.620 and μk = 0.540 and (b) μs = 0.440 and μk = 0.310

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