A dude jumping on a moving trampoline is a great excuse to dive into the unexpected properties of projectile motion.

In the Projectile Motion episode of NBC Learn's "The Science of NFL Football," you see that punted footballs travel in an arc known to mathematicians as a parabola.

Projectile motion problems can easily become algebra problems that focus on identifying the right number in a diagram and substituting it into the correct equation.

The main trick to solving projectile motion problems is to realize that you can treat the x-motion and y-motion as separate problems. Time is the connection between these two 1-D motion problems.

HONOLULU (HawaiiNewsNow) - Honolulu police and military personnel briefly closed the Maunalua Bay parking lot and surrounding roads to defuse projectile devices Wednesday afternoon.

Multiple roads in Hawaii Kai have been closed as the Honolulu Police Department responds to a projectile device incident at the Hawaii Kai Substation.