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AP Statistics/Unit 3: Collecting Data
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Initial Velocity and Time to Maximum Height

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The height, in meters, of a projectile is modeled by the function h(t)=−9.8t2+30t+2h(t)= -9.8t^2+30t+2, where tt is the time in seconds. If the projectile’s initial launch speed is increased by 5 m/s, the new height function is h(t)=−9.8t2+35t+2h(t)= -9.8t^2+35t+2. How does this modification affect the time required for the projectile to reach its maximum height?

Time, tt (s) Original Height (m) Modified Height (m)
0 2 2
1 22.2 26.2
1.5 24.65 27.45
2 17.4 24.4
A

It decreases, with the maximum height occurring sooner.

B

It remains unchanged because the acceleration is constant.

C

It increases, delaying the vertex to approximately 1.79 seconds.

D

It becomes unpredictable due to nonlinear effects.

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