#im so bad at mechanics this is really easy pls help

56 messages · Page 1 of 1 (latest)

trim depotBOT
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autumn jungle
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What is d=?

latent jungle
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distance

autumn jungle
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In terms of acceleration?

latent jungle
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i dont understand sorry

autumn jungle
latent jungle
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i think its A

autumn jungle
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Why?

latent jungle
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because work done = force x distance

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word done = energy transferred

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kinetic energy = 1/2 x m x v^2

autumn jungle
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This isn't a mcq

latent jungle
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which makes 1/2 x m x v^2 = F x v x t

autumn jungle
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There can be more than one answers

latent jungle
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really?

autumn jungle
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Yes

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It's MSQ

latent jungle
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i am only allowed to put one answer

autumn jungle
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Fr?

latent jungle
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yeah my teacher is kinda stupid

autumn jungle
latent jungle
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how did you get to C?

autumn jungle
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v²=u²+2as

latent jungle
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ah yeah

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that would work too

autumn jungle
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Idk about a

latent jungle
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yeah mine is way too complicated for a 1 marker

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so it probably isn't right

autumn jungle
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I guess

latent jungle
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this one is annoying me too

autumn jungle
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Ah

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You have to get the torque

latent jungle
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yeah

autumn jungle
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,w 0.3 × 5

astral mirageBOT
latent jungle
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that isnt one of the available options tho

autumn jungle
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,w 2×0.2 + 5×0.5

astral mirageBOT
autumn jungle
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Alright, I did not read the question right

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I guess we both are bad at mechanics

latent jungle
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like bro

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these questions seem so simple when explained to me

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but i cant do them

autumn jungle
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What would you do in this case?

latent jungle
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i found the markscheme

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basically

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the centre of mass is where the 2N acts

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so you can make an equation:

moment = anti-clockwise moment + clockwise moment

autumn jungle
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Alright, I thought about it for a while

latent jungle
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moment = (0.2 x 2) + -(0.3 x 5)

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| moment | = 1.1

autumn jungle
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0.3?

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Yes

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From centre the pivot is 0.2 and from pivot the weight is 0.3