Lower level physics problems submitted by other users

These days I am going through mechanics problems from level 1 to level 3. There are some serious issues which must be addressed about these I think. First, this guy submits many innovative problems and I think he works hard for creating problems. At the same time, I find that many times he posts wrong answers to his questions and doesn't even respond to disputes. As an example look at this problem. His problems are making my rating go down day by day and I am in 3rd level now. I am really surprised that staff hasn't looked into this issue so far.

Second thing is about units. I saw few low level problems where just to trick solver, unnecessary units like Mg (its megagram.. not milligram! ) are used. I think as far as physics is concerned, brilliant should make it compulsory to use standard units in all problems (like m/sec for speed). I hope that brilliant would take this issue seriously.

Thank you

Easy Math Editor

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Remember to wrap math in `$` ... `$` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$

Comments

Can you post more examples?

Josh Silverman Staff - 7 years, 2 months ago

I will search those problems. Give me some time. But what about the problem which I posted?

Snehal Shekatkar - 7 years, 2 months ago

I agree with you. Unless I've misread.

Josh Silverman Staff - 7 years, 2 months ago

@Josh Silverman – See this one also..

Snehal Shekatkar - 7 years, 2 months ago

@Josh Silverman – There were 2 more problems but I am now unable to find them. One was about relation between energy of electron and wavelength if emitted light where direct proportionality was taken and other was about elliptical room.

Snehal Shekatkar - 7 years, 2 months ago

Hi Snehal. Thanks for voicing these concerns. Sue, just posted a few Notes addressing some of the issues surround the rating system and problem quality control. Check them out here:

Peter Taylor Staff - 7 years, 2 months ago

Math	Appears as
Remember to wrap math in `\(` ... `\)` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$