10/14 Mukherjee

At the beginning of class, we turned in our lab reports. Then Mrs. Coats-Haan passed back the reports, but gave each student someone else's to grade. We had to follow a rubric to grade the reports and Mrs. Coats-Haan was at the front of the room explaining what the reports needed to have. At the end, the class voted to count the report as a 5pt. completion grade as opposed to a 40pt. accuracy grade. Once we handed the reports back in, each table did a quick experiment with two pennies and a ruler. To do this experiment, you had to put a penny on the ruler and a penny at the edge of the table. Then you would flick the ruler to hit the penny on the table and see which penny would fall first. If done correctly, both pennies fell at the exact same time. Then Mrs. Coats-Haan called us in the back of the room to see the concept of projectile motion with a ballistic car. Inside the car was a ball that shot upward by the trigger of a spring. Mrs. Coats-Haan proved that if the ball shot up while the car was moving, the ball would go straight back into the car. For the rest of the class, we watched a video of Julius Sumner Miller teaching projectile motion. The video was kind of outdated, as it was from the 70s, so it was funny seeing some of the things JSM said/did. For Monday, we have to complete the projectile motion packet and a cartoon guide to projectiles.

QOD: What was the point of the experiment with the penny and the ruler?
The objective was to see that both pennies would fall at the same time.