In my honors course we are covering kinematics concepts. There was this problem which stumbled me but then I figured out what I did wrong. I just want to make sure my concept was right. Here is the problem...(adsbygoogle = window.adsbygoogle || []).push({});

A diver springs upward with an intial speed of 1.8 m/s from a board that is 3 meters above

the surface of the pool (his displacement is y = -3m). What is the highest point he reaches above the water.

So this was my equation

v_{i}= 1.8 m/s

v_{f}= 0 m/s

a = -9.8 m/s^{2}

x = ?

Solved the equation and got x = 3.16 or 3.2

So the part that kind of confused me in the begining was that I only had vi and vf. There had to be one more piece to solve the equation. Thats when I realized that gravity works even when the object has a positive velocity in the upward y direction. But then I started

doubting my self so Im kind of confused.

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# Homework Help: Kinematics/free fall objects help.

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