(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A ball is thrown straight up with an initial speed of 30m/s,

(a) Show that the time it takes to reach the top of its trajectory will be 3 seconds.

(b) Show that it will reach a height of 45m (neglecting air resistance).

2. Relevant equations

Earth's gravity = 9.8 meter/second² (Professor said to just round it to 10).

Equation unknown.

d=1/2(g)t² ?

3. The attempt at a solution

(a) Played around with Subtracting negative -9.8m/s² (is it considered negative since the ball gets thrown up? - Instead of it coming down?).

(b) 45m = 1/2(9.8m/s²)t² - I figure I need to know "t" before I could solve this.

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# A ball is thrown in the air @ 30m/s...

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