A projectile is launched at an angle of 45° to the horizontal from 6 ft above the ground at an initial speed of 100 fusec. Assume the x-axis is horizontal, the positive y-axis is vertical (opposite g), the ground is horizontal, and only the gravitational force acts on the object. Answer parts a through d. a. Find the velocity and position vectors for t20. The velocity vector is v(t) = D

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