Class 9 Friday, 9/18/2020

Warm Up:  List all of the kinematics formulas that we have been using

1. vave =

2. vave =

3. vfinal =

4. a =

5. displacement =

6. (vfinal)2 =

 

Class 8 Thursday, 9/17/2020

Warm Up:  

What would the graphs look like if you graphed acceleration for these events? My answers

1.  A PE student runs from one end of the gym to the other and back (wall to wall) as fast as possible.

2.  A basketball is dropped from high above a gym floor and bounces back up until its velocity reaches zero.

3.  A skydiver steps out of a plane, begins to fall, opens a parachute, falls some more, and hits the ground.  [Assume all motion is vertical.]

 

  • All Students -- 1:30 Google Meet -- Use the link in Google Classroom (or watch the video -- class playlist).
  • All Students -- Practice:  
  • In-Person Only::
    • How to tie a trucker's hitch.  Get some rope and begin practicing. 
Class 7 Wednesday, 9/16/2020

Warm Up:  Match each position vs. time graph with the correct velocity and acceleration graph.

 

 

Class 6 Tuesday, 9/15/2020

Warm Up:  

1.  A race car is traveling counterclockwise around a circular track.  The car's speedometer stays on exactly 100mph the whole time.

Describe what happens to each of the following as the car makes one revolution around the track:  

a)  the car's speed   b) the car's velocity  c) the car's acceleration.

2.  How would you use dimensional analysis to convert 4m/s to mph?  Mathematically speaking, why does dimensional analysis work?

 

Class 5 Monday, 9/14/2020

Warm Up:  In the physics world, an object is in "free-fall" as long as gravity is the only force acting on that object.  The object may free-fall upward or downward.  Near the Earth's surface, the acceleration of free-falling objects due to gravity is approximately -9.8m/s2

Consider the case of this ball.  At t = 0s, the ball is free-falling directly upward with a speed of 20m/s.  Sketch graphs of the ball's position, velocity, and acceleration (vs. time) over the next 4 seconds. [For simplicity, use g =10m/s2 instead of g = 9.8m/s2]

  • All Students -- 1:30 Google Meet -- Use the link in Google Classroom (or watch the video -- class playlist).
    • Odds and Ends:
      1. Free-fall
      2. Problem suggestion
      3. Area under curve
  • All Students -- Practice:  
    1. Free-fall problems
    2. Complete Multiple Choice Section Only of Mr. Pennington's Old 1-D Kinematics Test Answer Key.
    3. If you have an old tarp that we can use, bring it in.
  • In-Person Only:
    • Tarp Shelters:
      • How to tie a trucker's hitch.  Get some rope and begin practicing. 
      • If you have an old tarp that we can use, bring it in.
    • Work time