Wright State University Lake Campus/2018-1/Phy2400/Log

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Test 2 Prep

T 2/6/18

Ping pong/air drag?

W 2/7/18

On Tuesday, both groups traded places and wrote group reports on the rolling ping pong ball and on the motion detector. That class chose not to have each group repeat the other's experiments because they felt the inter-group reports were sufficient. Does this lab want to do the same?

Watched Newton's Dark secrets?

R 2/8/18

Ping Pong/Air drag?

F 2/9/18

See Wright_State_University_Lake_Campus/2018-1/Ping_pong_air_drag. Went through calculation.

M 2/12/18

Worked on Test 2: friction and uniform circular motion.

T-R 2/13-15/18

• Advertisement for my open source wikibank of exam questions: This is an excellent page but it is not properly licensed for general use. And, contributions to extend the size of this bank are not possible.
• Exercises in drawing and utilizing free-body diagrams The Physics Teacher 37, 434 (1999); Skip 1 and 2. Write and solve numerical problems for 3-6. Make it a test question, that does not require a drawing (tough writing assignment). Submit the questions electronically to Pilot as individual reports. Submit the solutions (groups OK) on blanck typing paper, with your name(s) along the top inch margin, and "Public Domain" somewhere on the page.

W 2/14/18

$g=G{\frac {M}{R^{2}}}$ $M=\rho \cdot {\text{Vol}}=\rho \cdot {\frac {4}{3}}\pi R^{3}\propto \rho \cdot R^{3}$ ${\tilde {g}}=k{\frac {{\tilde {\rho }}{\tilde {R}}^{3}}{{\tilde {R}}^{2}}}=k{\tilde {\rho }}\cdot {\tilde {R}}={\tilde {\rho }}\cdot {\tilde {R}}$ where the tilde refers to g, ρ and R is weird units: Each is unity for the Earth.

$g_{SI}={\tilde {g}}\cdot 9.8\;m/s^{2}$ W 2/21/18 (Test 3 material)

• 1418173 to a08linearMomentumCollisions

W 3/7/18 Test 2:

File:Wright State Lake Campus phy2400 T2 equation sheet.pdf Equation sheet will be given to you at the time of the test.

Test 3 Prep

T 3/13/18

[

dates

2===M 3/5/18=== 2===T 3/6/18=== 2test===W 3/7/18===

Line integrals.

T 3/20

Formula sheet: OpenStax equations/University physics/Mechanics

after test 2

Before Test 3

3===R 3/8/18=== 3===F 3/9/18=== 3===M 3/12/18=== 3===T 3/13/18=== 3===W 3/14/18=== 3===R 3/15/18=== 3===F 3/16/18=== 3===M 3/19/18=== 3===T 3/20/18=== 3===W 3/21/18=== 3===R 3/22/18=== 3===F 3/23/18=== 2===M 3/26/18=== 2===T 3/27/18=== 3test===

Before Test4

R 4/12/18

Error propagation formula for simple power with one variable.

The error (uncertainty) in x has a porportionality with the error in f(x) if f=Ax^n. The error can be calculated by comparing f(x) with f(x+dx). Faster? way: df/f=ndx/x (obtained after algebra)

4===F 4/13/18=== 4===M 4/16/18=== 4===T 4/17/18=== 4test===

after test 4