#mechanics chapter 10 pulley question

76 messages · Page 1 of 1 (latest)

upper warren
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This is really complicated boss

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But you have to break it down

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Immediately

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5kg is mass

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So x 9.8 = weight

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And weight is force

sick canyon
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if ur talking about part a i did simultaneous equations

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for both particles

upper warren
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Acc I forgot broski

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😭😭💀💀

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Once you get to uni and do engineering

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You’ll realize a level

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Was useless

sick canyon
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Fair

cursive yacht
sick canyon
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ill send u my working

cursive yacht
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Ok

sick canyon
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I think I saw this part online

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With my answer

cursive yacht
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I meant 5g/7

sick canyon
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Na I got 3/7g

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Did I do smth wrong

cursive yacht
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Why did you use 3 for mass

sick canyon
cursive yacht
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Where has 3 come from

sick canyon
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simultaneous equations

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cuz the string is inextensible

cursive yacht
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T = ma
T = 2a

5g - T = 5a
5g - 2a = 5a
5g = 7a
a = 5g/7

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Did you do f = ma i teh wrong direction

sick canyon
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mb sorry yh

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theres no gravity acting on the table particle

cursive yacht
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That wasn't the point I was making

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Im ngl

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I dont understand your handwriting

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What the hell is on the rhs

image.png
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Oh you used a vertical force for a horizontal f = ma

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Very silly

sick canyon
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so wait T=2a right

cursive yacht
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,w sqrt( 2( (0.4)( (5*9.8)/7) )

sick canyon
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alr alr

low shoalBOT
sick canyon
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ill do the second part and tell u my answer]

cursive yacht
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ok

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Don't look in here until you're done I'm using this channel as a calculator

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,w sqrt( (20.45*9.8)/7 + 2(0.6)(9.8))

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4.61 to 3sf is my answer 😊

sick canyon
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what method did u do

cursive yacht
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I found the speed at the instant the string snaps and used that as an initial velocity for a free fall suvat

sick canyon
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yh

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what did u get the speed to be

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2.37

cursive yacht
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Yeah

sick canyon
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then what equation did u use

cursive yacht
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v^2 = u^2 + 2as

sick canyon
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i did that asw

cursive yacht
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I made a typo

sick canyon
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wait i think u made a mistake

cursive yacht
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I wrote 0.8 not 0.6

low shoalBOT
sick canyon
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oh wait mb nvm i made a mistake

cursive yacht
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4.17 to 3sf

sick canyon
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yh no for some reason i added the height instead of subtracting

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mb yh

cursive yacht
sick canyon
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ikr im so smort

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yh no i got ur answer

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ty

cursive yacht
cursive yacht
sick canyon
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im usually good with the vertical ones