DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS AP PHYSICS

Transcription

1 DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS AP PHYSICS

2 LSN 3-7: PROJECTILE MOTION IS PARABOLIC LSN 3-8: RELATIVE VELOCITY

3 Questions From Reading Actiity?

4 Big Idea(s): The interactions of an object with other objects can be described by forces.

5 Enduring Understanding(s): All forces share certain common characteristics when considered by obserers in inertial reference frames.

6 Essential Knowledge(s): An obserer in a particular reference frame can describe the motion of an object using such quantities as position, displacement, distance, elocity, speed, and acceleration. Displacement, elocity, and acceleration are all ector quantities. Displacement is change in position. Velocity is the rate of change of position with time. Acceleration is the rate of change of elocity with time. Changes in each property are epressed by subtracting initial alues from final alues. A choice of reference frame determines the direction and the magnitude of each of these quantities.

7 Essential Knowledge(s): Forces are described by ectors. Forces are detected by their influence on the motion of an object. Forces hae magnitude and direction.

8 Learning Objectie(s): The student is able to epress the motion of an object using narratie, mathematical, and graphical representations.

9 Learning Objectie(s): The student is able to analyze eperimental data describing the motion of an object and is able to epress the results of the analysis using narratie, mathematical, and graphical representations.

10 Learning Objectie(s): The student is able to represent forces in diagrams or mathematically using appropriately labeled ectors with magnitude, direction, and units during the analysis of a situation.

11 Projectile Motion is Parabolic* * If we ignore air resistance and assume acceleration due to graity is constant. For the mathniacs: y y g y gt t y t t

12 Projectile Motion is Parabolic * If we ignore air resistance and assume acceleration due to graity is constant. Where a and b are constant for a gien elocity and angle , b a y g b a g y g y y y y

13 Relatie Velocity

14 Relatie Velocity Eploring how obserations made in different reference frames can be related to each other through ector addition It is etremely important to: Draw a picture Label the ectors with meaningful subscripts

15 Relatie Velocity The first subscript refers to the object The second refers to the reference frame BW would refer to the boat with respect to the water WS would refer to the water with respect to the shore

16 Relatie Velocity Here, you are adding BW to WS to get BS Notice how the resultant, BS, will always hae the same first subscript of the first ector and the same second subscript of the second ector. Kinda like tail-to-head ector addition

17 Sample Problem #1 Homework #36

18 Sample Problem #2 Homework #43

19 Sample Problem #3 Homework #48

20 Sample Problem #4 Homework #51

21 Learning Objectie(s): The student is able to epress the motion of an object using narratie, mathematical, and graphical representations.

22 Learning Objectie(s): The student is able to analyze eperimental data describing the motion of an object and is able to epress the results of the analysis using narratie, mathematical, and graphical representations.

23 Learning Objectie(s): The student is able to represent forces in diagrams or mathematically using appropriately labeled ectors with magnitude, direction, and units during the analysis of a situation.

24 Essential Knowledge(s): An obserer in a particular reference frame can describe the motion of an object using such quantities as position, displacement, distance, elocity, speed, and acceleration. Displacement, elocity, and acceleration are all ector quantities. Displacement is change in position. Velocity is the rate of change of position with time. Acceleration is the rate of change of elocity with time. Changes in each property are epressed by subtracting initial alues from final alues. A choice of reference frame determines the direction and the magnitude of each of these quantities.

25 Essential Knowledge(s): Forces are described by ectors. Forces are detected by their influence on the motion of an object. Forces hae magnitude and direction.

26 Enduring Understanding(s): All forces share certain common characteristics when considered by obserers in inertial reference frames.

27 Big Idea(s): The interactions of an object with other objects can be described by forces.

28 QUESTIONS?

29 Homework #36-48