11-25

Today at the start of class we had a book check worth five points.

Then we went over the daily question: Yesterday, you observed that no matter the type of collision, equal forces were always applied! why might one vehicle receive more damage? Answers: The car may be made of different materials that might absorb the forces better or worse. The car may hit at different rates of speed or at different sides of the car. Another possibility is that there are safe outs in the car, "cripples". We then did a many tug-o-war lab. We paired up in partners and took two spring scales, hooked them together and pulled. Our conclusion of who pulls harder and how much harder was determined by the mass of the person and the forces applied by the muscles in which we were pulling with. Also outside forces that acted on the objects pulling.

We then talked about Newton's Third Law (law of action/reaction). All forces arise. Mr. Manning only knows six of Newtons laws.

Then Mr. Manning showed us a cartoon about inertia and forces. The can rolled down the hill creating the carbonation to expand as the particles of the soda move faster so it expands. When the cartoon character opens the can he is propelled forward by the forces of the pressurized can being released. He then asked us to complete a worksheet (Chapter 5 Newtons third law of motion:reaction and action.)