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3.8. Projectile and tube, , A projectile is fired, horizontally with speed vo, from the top of a cliff of height, h. It immediately enters a, fixed tube with length x, as, shown in Fig. 3.10. There is, friction between the projectile, and the tube, the effect of, which is to make the projectile, decelerate with constant, acceleration —a (a is a positive, quantity here). After the, projectile leaves the tube, it, undergoes normal projectile, motion down to the ground., , 0, , —, , , , Figure 3.10, , (a) What is the total horizontal, distance (call it @) that the, projectile travels, measured, from the base of the cliff?, Give your answer in terms, of x, h, Vo, g, and a., , (b) What value of x yields the, maximum value of £?