Projectile motion is like two 1-d kinematics problems that only have the time in common. The acceleration in the vertical direction is -g and the horizontal acceleration is zero.

I wish Angry Birds had been around when I was teaching high school physics. Please don’t think of the game as a hate crime against hogs, or an avian anger management program—instead, think of ...

This motion was created with a special device that shoots and drops two balls, but you can do something similar with just some coins. Put one coin on the edge of a table, so that it is just about ...