/sci/ - Science & Math » Thread #11108125

80KiB, 1080x208, Screenshot_20191031-132724_Chrome.jpg

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Anonymous Thu 31 Oct 17:31:03 2019 No.11108125 View Reply Original Report

Quoted By: >>11108146 >>11108171 >>11108230

Help me /sci/ there's a question I have no idea on how to solve and Chegg wants to scam me to offer me any help. What can I do? Where can I go? Pic related (is question) no clue what to do with frame rate and shutter speed. Physics giving me cancer right now

Anonymous

Anonymous Thu 31 Oct 2019 17:39:09 No.11108146 Report

Quoted By: >>11108159 >>11108312

>>11108125
compute the velocity of the bug in the second frame using the information about the
- length of the dot
- seconds elapsed between opening and closing shutter
next, assume constant acceleration during the inter-frame period
let x, the unknown, be the acceleration
compute the velocity in the second frame given constant acceleration, starting from zero velocity in the first frame
the velocity in the second frame is known
use this equation to solve for x

Anonymous

Anonymous Thu 31 Oct 2019 17:47:12 No.11108159 Report

Quoted By: >>11108183

>>11108146
So, the 7mm divided by the shutter speed should give me the velocity which I can then use with the time that a frame lasts (0.01s) to calculate the acceleration? Did I get that right?

Anonymous

Anonymous Thu 31 Oct 2019 17:50:59 No.11108171 Report

Quoted By: >>11108176 >>11108183

>>11108125
In 1/4000 seconds, the bug moved 7 mm.
7 mm / (1/4000) s = 28 m/s
The bug went from 0 m/s in one frame to 28 m/s in the next.
This occurs in 1/100 of a second due to the FPS.
28 m/s / (1/100) s = 2800 m/s^2

Anonymous

Anonymous Thu 31 Oct 2019 17:52:26 No.11108176 Report

Quoted By:

>>11108171
Yes okay that's what I got with the previous explanation. Thanks a bunch!

Anonymous

Anonymous Thu 31 Oct 2019 17:54:38 No.11108183 Report

Quoted By:

>>11108159
yes
>>11108171
yep

Anonymous

Anonymous Thu 31 Oct 2019 18:26:02 No.11108230 Report

Quoted By: >>11108233

>>11108125
Why does the white dot show up as a streak but the bug itself does not streak at all?

Anonymous

Anonymous Thu 31 Oct 2019 18:27:38 No.11108233 Report

Quoted By:

>>11108230
The dot is the bug

Anonymous

Anonymous Thu 31 Oct 2019 19:21:02 No.11108312 Report

Quoted By:

>>11108146
>next, assume constant acceleration during the inter-frame period
This is pretty retarded, like who is to say the insect didn't jump just before the second frame, but there isn't much else to do.

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