11-10

Physics was very interesting today. When we arrived to physics Mr. Manning had a half sheet of paper waiting for us, to do a graded daily question. He flipped on the smart board and a question was waiting. The question related to the net force problems that we were doing on Friday. The problem asked to find the missing force, which was not shown. It showed a diagram of a box with a mass of 8 kilograms and an acceleration of 10 meters per second squared. It also showed arrows with forces on them. One arrow was 120 newtons and it pointed to the right, the other arrow was 10 newtons and it pointed to the left. The answer to the problem was –30 newtons of net force. It was –30 newtons because you had to plug the numbers into the equations with direction. The one arrow that pointed right would be positive and the arrow pointing left would be negative. When you plug in the numbers to the formula, you get –30 newtons. There was another part of the daily question and it asked if the acceleration of the block was doubled how much would the net force increase. The answer was the net force would also double. After Mr. Manning collected the daily questions, we worked on the labs that we started on Friday. This lab was the mass vs. weight lab. The lab required us to collect data, make graphs and answer questions accordingly. The final conclusion of the lab is that weight is a force and weight is calculated due to gravity. Weights would change on different planets. One part of the lab even made us calculate the weight of an eighty-kilogram person on Earth, the Moon and Mars. Overall, I learned a lot from today’s physics class.