## Electrostatics Practice Test Answers

The test is on Wednesday.

Multiple Choice:

1. D

2. C

3. A

4. C

5. C

6. A

7. C

8. D

9. A

10. B

Written Answers:

Category: Physics 12

The test is on Wednesday.

Multiple Choice:

1. D

2. C

3. A

4. C

5. C

6. A

7. C

8. D

9. A

10. B

Written Answers:

Electrostatics worksheet 3: do numbers 3, 4, and 6 (yes… all of 6)… read more

On worksheet 3, do numbers 1 & 2.… read more

Tuesday: Worksheet 2: do numbers 1-4, 6

Wednesday: also do numbers 8, 10, 11

Watch the videos again! That’s your assigned viewing for tonight. (You can skip the one on electric fields and focus on electric potential.

A video on electric fields, what we covered in class today:

An energy problem involving electrical potential energy:

Electric Potential: this is a very dense complex video.… read more

Worksheet 1 # 1-6… read more

This video is only 10 minutes but EXTREMELY dense. Consider playing it at 0.75X speed and pausing frequently to take notes. That’s right – you are taking notes on these videos, right?

And a demonstration of a single force calculation using Coulomb’s law, with some explanation of the equation.… read more

Written response:

Circular Motion:

1. 1600 N

2. 7.7 rpm

3. coefficient when “just about to slip” = 0.61, so mu = 0.82 is fine

4. 11 N

Gravitation:

5. 9.2 hours

6. 3.3E8 m/s (note this is faster than the speed of light – no escape!)

7.… read more

We can apply our new improved understanding of gravity to work out circular motion problems involving orbits:

https://www.flippingphysics.com/geostationary-orbit.html

And just like we needed a new equation for gravitational force, we need a new one for gravitational potential energy.

This could cause some people confusion… negative energy?!… read more

Finish up the practice sheet.… read more

Practice problems assigned so far in this unit:

Basic: # 1-9

Advanced # 1-3

The law of gravitation (a formula):

https://www.flippingphysics.com/universal-law-gravitation.html

A simple sample problem:

https://www.flippingphysics.com/mermaid-doughnut-gravity.html