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Problem #13: Suppose the trajectory of a projectile is given by r(1) = 2ti + (4 - 16 -)j. : 2 0. The initial speed of the [4 marks] projectile is 2 ft/s. (a) Find initial position of the projectile. Enter the values of x(0) and y(0) (in that order) into the answer box below, separated with a comma. (b) Find the angle of elevation, @ E [0. 2x) at which the projectile was thrown. (c) Which of the following curves describes the trajectory of the projectile? Problem #13(a): Enter your answer symbolically, as in these examples Problem #13(b): Enter your answer symbolically, as in these examples (A) y =1 -4x2 (B) y = -4 (C) y=4-4 -10 1 2 3 2 2 T (D) y = 4 - 4x2 2 2 T Problem #13(c): |Select v Save