Masses on incline system problem | Forces and Newton's laws of motion | Physics

Masses on incline system problem | Forces and Newton's laws of motion | Physics | Khan Academy

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8 жыл бұрын

In this video David explains how to find the acceleration and tension for a system of masses involving an incline.
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Пікірлер: 29

@jimenamargalef8262 6 жыл бұрын

Thank you so much!

@reydexterlopez2278 3 жыл бұрын

This is what I'm looking. Hope this help me

@oak6677 4 жыл бұрын

These videos are soo underrated.... people please hit the like button!!

@airicsnider7572 6 жыл бұрын

Fuck why don't they teach it like this in school?

@abdulazim7211 4 жыл бұрын

what will be the answer if mass intechange betwwen them, i mean heavy one keep in inclination, pls know me soon

@ssjdashti 5 жыл бұрын

Just tried doing this same exact method with a problem from my physics text book and this method did not result in the correct answer that the book got...

@zenoramohammed7860 6 жыл бұрын

So the acceleration of the 9kg and 4kg blocks are the same? ie the acceleration of the 4kg block is 4.75m/s and is positive since it is moving up the inclined plane if needed to be used to calculate internal forces such as Tension like you did with the 9kg block?

@bertyalbert2603 2 жыл бұрын

yes they’re the same because both are connected with unstretchable rope (both blocks act as one system)

@ebrahimessack8056 6 жыл бұрын

Hi I have the same problem, but the next question, the hanging block is submerged in water, calculate the new tension and acceleration? Please help. I’m not given the density or volume of the second block, only the mass. The block on the incline volume is 8cm^3.

@dianchoiriah4919 4 жыл бұрын

in water the block weight would reduce slightly, ( the density of water is usually constant, around 1000kg/ m3) but u need to know the volume for the submerged block

@minecraftnation9940 6 жыл бұрын

How’d it get 45.5? I’ve tried getting t by itself and I’ve gotten every answer but that one

@fzx4868 3 жыл бұрын

YES, HOW?

@justafan8423 4 жыл бұрын

what if the two masses were switched? how could we assume which direction the system would accelerate in?

@alisonho3724 4 жыл бұрын

intuitively the system would go in the direction of the heavier mass

@dianchoiriah4919 4 жыл бұрын

it ussually follows the bigger mass bcs the friction wont mean too much

@zhouwenli 9 ай бұрын

@@dianchoiriah4919slope. Imagine that 4kg object placed on a super steep surface

@icanc0 3 жыл бұрын

anyone else watching this video an hour before the quiz?

@therandomofrandom9152 2 жыл бұрын

Yes

@aafrinmuaazah3863 5 жыл бұрын

wait....isnt the tension supposed to be considered?

@harikashatdharshanam4711 5 жыл бұрын

No because it's an internal force in this problem

@irinabains4300 3 жыл бұрын

shouldn't it be mgcos theta instead of mgsin theta?

@drofeng 2 жыл бұрын

mgsin(theta) in the direction parallel to the plane. This can be visualised by drawing a free body diagram. See this worked example kzfaq.info/get/bejne/kNZ8aKV6urvRomQ.html

@CodfishT30 4 жыл бұрын

Everyone's here because they're going to fail the physics test tomorrow

@beneng2626 2 жыл бұрын

why you gotta call me out like that

@nimrat_b 2 жыл бұрын

@@beneng2626 nah literally 💀

@Tibb3rsSeptim 6 жыл бұрын

my nigga

@Benjamanic 2 жыл бұрын

I'm sure that this is not relevant to the question you're answering, but I'm not sure how to even google my question without spending an inordinate amount of time sifting through information that doesn't directly address my question. My question is regarding the line perpendicular to the floor: Let's say I lean an object with a mass of x against a wall. A piece of plywood or whatever. It is leaning against the wall at an 85 degree angle relative to the floor, a 5 degree angle in terms of the triangle it creates at the point of contact with the wall. How much force is placed on the wall relative to mass x? I'm leaning a lot of boards against a wall and I need to know how much of a load that wall needs to be able to withstand.