Eddie tests out his skateboard on two different hills and finds he goes faster on the steeper hill -- what is the dependent variable (the result/thing we measure) in this experiment?

Eddie completes his experiment and needs to explain how he is sure his results ONLY show the affect of the hill on speed --what variable(s) did he control to make this happen?

Xavier and Alonzo decide they want to see who can kick a soccer ball the farthest -- what is the independent variable (the thing we change/test) in this experiment?

The Negron twins have each kicked the soccer ball and measured how far it travelled -- what was the dependent variable (thing we measure) in their experiment?

The balls velocity when it was kicked by Alonzo changed from 0 ft/s to 30 ft/s -- what change to velocity occurred here?

When Xavier kicked the soccer ball it went from 0ft/s to 40ft/s; when Alonzo kicked the soccer ball it went from 0ft/s to 30ft/s; which twin exerted the stronger force on the soccer ball?

Samia and Randy are playing air hockey and Samia hits a puck at Randy with a force of 20. He hits the puck in the opposite direction with a force of 20 -- what does the puck do?

Randy wants to hit the puck back to Samia at a faster velocity than she hit it to him. She hit with a force of 20 so it moved at a velocity of 20 cm/s. What is the minimum force Randy needs to hit the puck for it to change direction AND go faster than 20 cm/s?

Orla chases her tennis ball around Ms. Torres' apartment, and she runs so fast across the floor she starts sliding -- why does she eventually slow down and stop sliding?