Physics in Motion

In previous centuries, armies used catapults to fire projectiles into enemy fortresses. The task of the commander was to determine the best angle to fire a cannon ball for maximum distance. Accuracy was an iffy proposition because of a lack of knowledge about the scientific and mathematical principles involved. If only the invaders could have waited about 300 years? The students in Mrs. Alaine Frankland’s physics class at the TCTC would have provided them with expert advice.

Recently, the students constructed ballistic devices that propelled ping pong balls. Each device had to launch the ball a specified distance somewhere between 15 and 25 feet and to land in a container that was provided. The students also calculated the speed of the object by using the distance it traveled and the angle of launch.

Some of the materials used by the students in the construction phase of the project were rubber bands, mouse traps, batteries, compressed air, and very low type explosives such as baking soda/vinegar.

Frankland’s purpose in designing the experiment was to apply the concepts of projectile motion and to analyze the components of velocity. She combined the scientific knowledge learned in physics class with the creativity of her students. The result was greater than the sum of its parts. In addition to ping pong balls that were sent flying, a quality learning experience was absorbed.