There were 3 experiments in this topic-the fastest ball challenge/achieving 1.2s/achieving 1.4s.
<The fastest ball challenge>:
The main idea of this challenge was to try various angles and distance to find/achieve the fastest time for an iron ball to travel between the two photo gates.
We had to use the concepts of conservation energy,kinetic energy and potential energy.
-Energy is neither created or destroyed.
-The energy can only be transformed from one state to another.
-formula for gravitational potential energy:mgh
-formula for kinetic energy:1/2mv^
The most suitable angle:35.2º