Originally Posted by

**FlexedCookie** Hi all.

I got this question from my example booklet, which has the question worked. However, im not quite sure how the problem is solved, and i cant follow how the exmaple booklet does it.

If someone could break down the steps for me that would be amazing.

This is what the booklets steps are:

**-300 = 0 + (1/2) * (-9.8) * t^2**

**t^2 = -300 * 2 / -9.8**

**t^2=61.22**

**hence, t = 7.8s **

I dont understand how it goes from the first line to the second one.

Any help would be greatly appreciated.

Thanks.