Find the speed of the particle after 0.2 seconds

[annalian]

Homework Statement

The particle is thrown horizontally with speed 10 m/S (I believe from a height). Find the speed of it after 0.2 seconds.

Homework Equations

vx=v
vy=gt
v=sqrt(vx^2+vy^2)[/B]

The Attempt at a Solution

vx=10
vy=10*0.2=2
v=sqrt(100+4)=10.198m/S Am i right?

 

[TomHart]

Looks right to me. I think it is probably more common to use 9.8 ms^-2 for gravity though.