- #1

Fusilli_Jerry89

- 159

- 0

What I did:

Time(penny)+Time(sound)=2.5

T(p)=2.5-T(s)

T(s)=x

T(p)=2.5-x

d=vit+1/2at^2

330x=1/2(-9.8)(2.5-x)^2

I then solved using the quadratic forumula and got -62.2 or-0.102. I then chose the 0.102 seconds and multipled it by 330 and got 33.7 m. If this is right, my question is how can both times be negative, and how can you decifer which one is right besides using common sense?