How could the location of tests affect the performance of a catapult?

It could affect how far the projectile travels

Explanation:

Facing Uphill: Moves less far

Downhill: Moves further

The location of tests affect the performance of a catapult depending on the length of the arm.

Explanation:

A ball from a catapult, will travel a longer distance by increasing the length of the arm. Using the catapult, if the arm is extended to different lengths the wooden ball how far it is thrown can be observed.

This shows that extending the arm length does increase the distance thrown. To shoot a far distance (example for sideways) you need to the pebble sideways and up. By doing this, it can travel a longer distance