11/12/09

A Case of the Mondays

Pretty much everyone today said it felt like a Monday. Know what? They're right...

Honors Physics , Physics F and G engaged in their Chapter 6 graded learning experience today and will move on to circular motion tomorrow. We have been neglecting the fact that many objects revolve or rotate, even when experiencing linear motion. The next two chapters will allow students the opportunity to examine rotational motion and incorporate that material into their overall examination of mechanics. In Chapter 7, descriptors of circular motion will be introduced, as will the nature of the forces involved in maintaining circular motion. The lab for this unit will focus on centripetal force, how it can be measured and what factors affect the magnitude of the centripetal force an object in circular motion experiences. Honors Physics works on that tomorrow, and Physics F and G will conduct the investigation on Monday and Tuesday. One point to note about this unit: make sure that your calculator is set to receive measurements in radians, not degrees. Ask me for help if you have need. When we work with displacement for rotational motion, the proper value is in radians – another way, besides degrees, to report fractions of a circle. If you have yet to work with radians and the unit circle in math, we’ll do a bit of review at the beginning of the unit which should bring you up to speed.

Physical Science B worked on their buoyant forces lab and got quality results for congruence between apparent loss of weight by an object and weight of water displaced by the object. Their calculated values were pretty close to the measured values, not exact, but there is always a margin for error in experiments. Then, they had a bit of time at the end of the period to review material for tomorrow’s exam, which was what Physical Science E worked on all period. Some of the math required for this section is not on the MCAS formula sheet, so I’ll have those additional formulas available for you tomorrow. For both sections, study the textbook, notes and worksheets and please don’t forget your calculators. Here is a worksheet with more practice problems for hydraulics, pressure at depth and buoyant forces.
P.S. Mikaela D - found your Buoyant Forces lab sheet (was caught in the staple of another student's work).

Homework

Honors Physics A: Read lab sheet. Complete 7A #1-3, 7B #1-3 and 7C #1,2 by Monday
Physical Science B: Complete lab write up by Monday. Study for tomorrow’s exam
Physical Science E: Study for tomorrow’s exam
Physics F and G: Read 7.1 in the book and complete p. 252 #1 and p. 269 #1-5

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