A ball is thrown straight up from ground level

[Emely]

A ball is thrown straight up from ground level. After a time 6.1 s, it passes a height of 136.1 m. What was its initial speed? The accelera-
tion due to gravity is 9.8 m/s2 . Answer in units of m/s.

Homework Equations

The Attempt at a Solution

 

[CWatters]

Please show your attempt at the problem (forum rules).

 

[Emely]

A ball is thrown straight up from ground level. After a time 6.1 s, it passes a height of 136.1 m. What was its initial speed? The accelera-
tion due to gravity is 9.8 m/s2 . Answer in units of m/s.

Homework Equations

The Attempt at a Solution

Delta x= 136.1
T=6.1
A=9.8
Vi*t+1/2at^2

 

[Emely]

Please show your attempt at the problem (forum rules).

I did it

 

[CWatters]

Delta x= 136.1
T=6.1
A=9.8
Vi*t+1/2at^2

That last equation is incomplete.

Vi*t+1/2at^2 = ?