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A Projectile Is Launched from Ground Level at an Angle θ\theta

Question 30

Multiple Choice

A projectile is launched from ground level at an angle of θ\theta with the horizontal. The initial velocity is v0v _ { 0 } feet per second and the path of the projectile is modeled by the parametric equations x=(v0cosθ) t and y=(v0sinθ) t16t2x = \left( v _ { 0 } \cos \theta \right) t \text { and } y = \left( v _ { 0 } \sin \theta \right) t - 16 t ^ { 2 } \text {. }
Use a graphing utility to graph the paths of a projectile launched from ground level with the values given for θ\theta and v0v _ { 0 } . Use the graph to approximate the maximum height and range of the projectile to the nearest foot.
θ=55,v0=56 feet per second \theta = 55 ^ { \circ } , \quad v _ { 0 } = 56 \text { feet per second }


A) maximum height 49\approx 49 feet range 4\approx 4 feet
B) maximum height 4\approx 4 feet range 49\approx 49 feet
C) maximum height 33\approx 33 feet range 92\approx 92 feet
D) maximum height 92\approx 92 feet range 33\approx 33 feet
E) maximum height 43\approx 43 feet \quad range 8\approx 8 feet

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