Finding Projectile Velocity with a Spring Launcher - Kinematics Equations

[fyzikschik]

projectile motion --please help :(

Homework Statement

you have a spring launcher and it can shoot springs at angles that you can alter, but you need to find the velocity at the given angle. the velocity you need to find is like muzzle velocity. you're supposed to stretch the spring and it needs to be shot vertically into the air.
also the launch height isn't necessarily the same as when it lands. how would u find this velocity thru experimentation?!

Homework Equations

kinematics equations

The Attempt at a Solution

pleasezz help

 

[andrevdh]

Use a stopwatch to determine the time till it lands on the ground.