Honors Physics reviewed their homework problem for normal force, net force and acceleration before pole-vaulting into friction. Static and kinetic friction were contrasted the the nature of the coefficient of friction was described. To work problems with friction, proper calculation of the normal force is required, which is why we spent additional time on that topic yesterday. We'll go over the work on Monday, have a brief discussion on air resistance and then begin the review process for Wednesday's exam.
Physics B and F took their Forces exam, but since F was long block, Physics F got to begin a lab on the Impulse-Momentum Theorem. We start discussing momentum in B Block on Monday and F Block will have time to complete their labs.
Physical Science reviewed their N-2 lab before reviewing their N-2 homework assignment from Wednesday. The lab nicely demonstrated that when applied force is held constant, increasing mass decreases acceleration and decreasing mass increases acceleration, in accordance with Newton's 2nd Law of Motion. Students then received a series of practice problems for N-2, which snuck in good things like unit conversions and calculations of acceleration. The answers to those problems are provided below, but we will go over them in class on Monday, as well.
- 2.76 x 10-3 m/s2
- -448 m/s2
- 0.400 m/s2
- -6.12 m/s2
- 0.37 kg
- 2.0 x 104kg
- 9.5 x 104kg
- a. 0.2 N b. 2 kg
- 2.06 x 104N
- -1.86 x 107N
- -3.6 x 105N
- 1.7 x 106N
- 9.4 m/s2
- 15 kg
- 3.16 N
- 0.532 m/s2
- a. 6.41 x 104kg b. 1.31 x 103
- a. -1.8 x 103m/s2; 180 g b. 1.3 x 105N
Homework
Honors Physics: 4C #2; 4D #1,4; 4.4 Section Review omit ALL of question 3 (note the change)
Physics B and F: None
Physical Science: Complete Newton's 2nd Law of Motion problem sheet
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