An 80 kg runner has a vertical acceleration of 2.67 m/s2 and a horizontal acceleration of 3.29m/s2.Calculate the horizontal and vertical reaction forces (Note: you should draw a free-body diagram and sum the forces in the X and Y-direction). b. The above runner had an initial vertical velocity of -0.75 m/s and an initial horizontal velocity of 0.9 m/s. If the forces were applied over a period of 0.25 seconds, what are the runner's final vertical and horizontal velocities?

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