# MrFlint.com

The online companion to your favorite class.

- Intro. to 2-D motion and static forces
- Statics vs. dynamics
- The Bird on a Wire problem as a demonstration with the rope and weight
- Hang a 5 kg mass from a pair of ropes that make a 30° angle with the horizontal. How much tension is in each rope? What if the angle is reduced to 10°? What about 1°?
- A 30 N sign is supported by a horizontal cable and a cable that makes a 50° angle with the horizontal. How much tension is in each cable?

- Forces on inclined planes
- Rotation of 2-D axis to match plane surface. Description of forces that act on objects in equilibrium and dynamic cases on inclined planes

- P. 170, 30-34 due
- Go over problems in class

- Friction on inclined planes
- Intro. to Inclined Plane Lab

- P. 170, 35-38 due
- Hand in problems
- Work on inclined plane lab

- 1-D projectiles
- Simple monkey gun demonstration
- Finding time is the key to solving projectile problems
- A toy car rolls off our 0.95 m tall lab desk at a speed of 3.0 m/s. Where does it hit the ground?
- How high is a cliff if a rock that rolls off the cliff hits at a velocity of 22 m/s at an angle of 15° from the vertical?

- P. 170, 39-41 and 45 due

- Go over problems together

- Friction on Inclined Plane lab due
- Qualitative type 2 projectile example

- Work on problems

- Type 2 projectile example problems

- Intro. to Projectile Lab

- Projectile Lab

- Projectile problems due (put solutions on the board)

- Definining rotational speed as the ratio of circumference to period
- Defining centripetal acceleration
- Defining centripetal force
- Know that centripetal force is always provided by some action force
- Tension force if a ball whirled on a string
- Friction force for a car going around a corner
- Gravitational force for orbital motion
- Electrical force for electron motion around a nucleus

- Work on projectiles lab
- Work on circular motion problems
- Work on Chapter 7 Review

- P. 172, 49-53 due
- Go over problems on the board.
- Continue working on Chapter 7 Review and Projectiles Lab

- Projectiles Lab Due
- Go over problems on the board.
- Continue working on Chapter 7 Review and Projectiles Lab

- Chapter 7 Review due
- Go over problems on the board.
- Go over issues with the inclined plane and projectiles lab

- Go over some review problems on the board.

- Go over remaining review problems on the board.

- Chapter 7 Test

- Introduction to Gravitational motion
- Tour of the Solar System model
- Gravity as a centripetal force

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