3-6

We took a unit 8 quiz at the start of class worth only 10 pts and half of it being multiple choice. One of the questions was: a) a axis can rotate b) all parts on a rotating object are the same distance away from the axis c) all parts including the axis rotate at the same speed d) all parts including the axis rotate at the same angle** "b" is the the one that is false about a axis because an axis does not have all parts on a rotating object have equal distances away from the axis.
 * What if false about an axis?

The last 5 points of the test were devoted to solving a problem in which we have to find the frequency of a spinning blade on a helicopter & find its tangential speed of the blade at its tip. We had to apply the information given into the Time equation (1/f) & the Velocity equation (2*pie*r/t). Once everyone completed this quiz we worked on the first couple data tables of the Centripetal Forces Lab.For each data table, there was a different question; which lead to different control factors and different variables changing. In the 1st question, the mass and the radius remained constant throughtout each trial in that certain experiment. Kelsey messed up a couple times which altered our data, but of course Mr. Manning is a genuis and fixed the problem. In this data table, it became obvious that the more centripetal force, the more speed involved and vica versa. In the next data table, we didnt finish it because time ran out and we probably will finish monday... In question # 2, the force was constant at 1.00 N and the mass obviously is always constant. Each trial the radius was increased (besides the very 1st one), therefore the speed increased.