A tennis ball machine serves a ball vertically into the air from a height of 2 feet, with an initial speed of 120 feet per second. What is the maximum height, in feet, the ball will attain?

Question

anonymous · Answer

. A tennis ball machine serves a ball vertically into the air from a height of two feet, with an initial speed of 120 feet per second. After how many seconds does the ball attain its maximum height?

homeworksucks · Answer

At the maximum height (funny, I just asked my Physics teacher this not 6 hours ago), the velocity would be 0.

homeworksucks · Answer

You can use your kinematics equations from there

anonymous · Answer

huh

homeworksucks · Answer

The velocity would be 0 at the very top (if you throw a tennis ball up, it kinda pauses for like a fraction of a second). So you can use the equation $$(v _{f})^{2}=(v _{i})^{2}+2a \Delta d$$

homeworksucks · Answer

Rearranging for displacement,

homeworksucks · Answer

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