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The Parametric Equations for the Path of a Projectile Launched θ\theta

Question 51

Multiple Choice

The parametric equations for the path of a projectile launched at a height h feet above the ground, at an angle θ\theta with the horizontal and having an initial velocity of v0v _ { 0 } feet per second is given by x=(v0cosθ) tx = \left( v _ { 0 } \cos \theta \right) t and y=h+(v0sinθ) t16t2y = h + \left( v _ { 0 } \sin \theta \right) t - 16 t ^ { 2 } . The center field fence in a ballpark is 10 feet high and 400 feet from home plate. The ball is hit 3 feet above the ground. It leaves the bat at an angle of θ\theta degrees with the horizontal at a speed of 100 miles per hour as shown in the figure. Find the minimum angle at which the ball must leave the bat in order for the hit to be a home run using the parametric equations x=(4403cosθ) tx = \left( \frac { 440 } { 3 } \cos \theta \right) t and y=3+(4403sinθ) t16t2y = 3 + \left( \frac { 440 } { 3 } \sin \theta \right) t - 16 t ^ { 2 } . Round your answer to one decimal place.
 The parametric equations for the path of a projectile launched at a height h feet above the ground, at an angle  \theta  with the horizontal and having an initial velocity of  v _ { 0 }  feet per second is given by  x = \left( v _ { 0 } \cos \theta \right)  t  and  y = h + \left( v _ { 0 } \sin \theta \right)  t - 16 t ^ { 2 } . The center field fence in a ballpark is 10 feet high and 400 feet from home plate. The ball is hit 3 feet above the ground. It leaves the bat at an angle of  \theta  degrees with the horizontal at a speed of 100 miles per hour as shown in the figure. Find the minimum angle at which the ball must leave the bat in order for the hit to be a home run using the parametric equations  x = \left( \frac { 440 } { 3 } \cos \theta \right)  t  and  y = 3 + \left( \frac { 440 } { 3 } \sin \theta \right)  t - 16 t ^ { 2 } . Round your answer to one decimal place.    A)   25.5 ^ { \circ }  B)   19.4 ^ { \circ }  C)   3.4 ^ { \circ }  D)   4.5 ^ { \circ }  E)   11.3 ^ { \circ }


A) 25.525.5 ^ { \circ }
B) 19.419.4 ^ { \circ }
C) 3.43.4 ^ { \circ }
D) 4.54.5 ^ { \circ }
E) 11.311.3 ^ { \circ }

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