Kinematics Equations and a Cliff

[ehild]

Haha, not worth it. And I have no idea why he made the solution so overly confusing.

Coward! A brave man should fight for the truth!
You can ask him to explain the "correct" solution to you as you got different result... And then he either founds his own error or we find his error or our error, if any.
If he made the solution confusing, he could have confused himself.

 

[Delphi51]

I really like the two headings for horizontal and vertical parts of the motion in that example. That is a great first step in any two dimensional motion problem. The second step is to identify which part is accelerated motion and write the appropriate formulas.