Honors Physics Specials Created for CVCA Physics By
Honors Physics Specials Created for CVCA Physics By Dick Heckathorn 27 October 2 K + 4
Table of Contents 03 07 12 16 22 Conc. Dev. 4. 1 Inertia p 11 Conc. Dev. 5. 1 Friction p 17 Conc. Dev. 4. 2 Statics p 13 Conc. Dev. 4. 2 Vectors and Equilibrium N. T. Q. Holding Block to Wall 26 Conc. Dev. 4. 3 Net Force p 16
Concept Development 4. 1 Inertia Page 11
1. The An astronaut in outertospace rock’s tendency do this inertia. away from all forces throws a is called… rock. is What will happen to the What inertia? rock? How is it measured? grams /kg. CD p 11
Whatrock is the path ofwhirled the rock 2. The is being at when the breaks? the end ofstring a string in a clockwise rotation as seen A from above. B C D CD p 11
3. The bus is traveling at 100 km/h. Relative to the bus, the pencil is traveling at… 0 km/h. As the pencil drops, its horizontal velocity is 100 km/h. Wherewillthe thepencil strike floor? pencilthe strike the Directly below floor if the buswhere is dropped. at rest? Directly below where it is dropped. CD p 11
Concept Development 5. 1 Friction Page 17
Fg on crate Crate is at rest. CD 5. 1 p 17 Fe on crate
Fg on crate FP on crate Fg on crate CD 5. 1 p 17 Crate is at rest. Fe on crate
Fg on crate FP on crate CD 5. 1 p 17 Crate is speeding up. Fe on crate
Fg on crate FP on crate Crate is moving at constant v. Fe on crate CD 5. 1 p 17
Concept Development 4. 2 Statics Page 13
300 300 CD p 13 150
100 CD p 13 300 150 No!!!
500 830 1000 CD p 13
Concept Development 4. 2 Vectors and Equilibrium Page 14
The rock hangs at rest. What force(s) act on it? How do they compare? CD p 14 T Fs on r The net force on the rock is… Zero. W Fe on r
The rock is suspended by two strings. There is a tension in each string. How big is each tension? E FA on r FB on r W Fe on r The net force is … 0 CD p 14 B A
What is different here? The angles are different. Find the magnitude of A and B. E A B W Fe on r CD p 14
E A The tension is greater in A or B? CD p 14 B W Fe on r
A B Fe on r A CD p 14 Fe on r B
Next Time Question 4. 3 Holding Book to Wall
No Friction Push. Find Up with Specific Force Components
Push Up with Less Force Friction Up
Friction Down Push Up with Greater Force
Concept Development 4. 3 Net Force Page 16
4 Fnet = 0 4 3 CD p 16 4 Fnet = 1
4 4 3 Fnet = 5 4 2 CD p 16 Fnet = 5 3 2 5 Fnet = 5 3 4 3 5 Fnet = 5
9. 9 0 CD p 16 7
- Slides: 29