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Initial speed help.

  • Thread starter iac0b
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  • #1
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A ball is launched directly upward from ground level with an initial speed of 18 m/s. (Air resistance is negligible.)

What equation would I use to find the time the ball was in the air?
 

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  • #2
berkeman
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A ball is launched directly upward from ground level with an initial speed of 18 m/s. (Air resistance is negligible.)

What equation would I use to find the time the ball was in the air?
Welcome to the PF.

Thread moved to Homework Help / Intro Physics.

You would use the Kinematic Equations of Motion for constant acceleration (since the acceleration due to gravity is constant on the Earth's surface). See half-way down this wikipedia page:

http://en.wikipedia.org/wiki/Kinematic_equations#Equations_of_uniformly_accelerated_motion

.
 
  • #3
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Thanks :)
 

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