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What is my approach to solving this kind of problem?: "A graduation hat is thrown vertically with a speed of 5m/s. How long does it take the hat to reach maximum height?"



Answer :

AL2006

The approach is . . .

1).  As inappropriate as it may seem for a graduation hat, you must ignore the effects of air resistance.

2).  Remember the acceleration due to gravity ... 9.8 m/s² downward.
That means that ANYTHING acted on by only the force of gravity has its
upward speed decreasing by 9.8 m/s every second.  So any object tossed
upward at 5 m/s continues to rise for  (5 / 9.8) seconds, whereupon it runs
out of gas and begins to fall.


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