How Does Gravity on Planet Zircon Compare to Earth?

[wadini]

An astronaut on the planet Zircon tosses a rock horizontally with a speed of 6.55 m/s . The rock falls through a vertical distance of 1.20 m and lands a horizontal distance of 8.60 m from the astronaut. What is the acceleration of gravity on zicron?

I have no idea how to even start.

 

[wadini]

i think x may be 8.60

 

[wadini]

okay so what I am thinking is that the Vinitial is 6.55 m/s and x=8.60 and form there I can find time

 

[wadini]

so I know I have to find time and then from there I can find acceleration but I don't know how to find time from what is given..?

 

[LowlyPion]

An astronaut on the planet Zircon tosses a rock horizontally with a speed of 6.55 m/s . The rock falls through a vertical distance of 1.20 m and lands a horizontal distance of 8.60 m from the astronaut. What is the acceleration of gravity on zicron?

I have no idea how to even start.

On Earth it's

y = 1/2*g*t²

The time can be determined from

d/v = t

So on Zircon ...

1.2m = 1/2*Z*(d/v)²

or Z = 2*1.2*(v/d)²