Need an idea for a project in physics

Question

My teacher is demanding a project that requires me to use anything related to gravity, acceleration, speed, or velocity. Anything will do, an experiment or written projects. *Note* needs to be possible in 3 days.

Answer 1

You could do an easy free-fall motion problem! Stand on top of a building or something and drop a stone. Use the equations for motion and energy to calculate a lot of values. Then draw a diagram showing what you did. You could maybe even make a graph or graphs with a data table.

Answer 2

try to find the optimum shape for a known weight of blu-tac to sink through a known depth of water!