Introduction to mechanical advantage

[goldensilverstar]

where the fuck is more moments?

[adamaqmal]

my fav subject

[shayan894]

Hello Salman first of all i want to thank you for all your efforts.Salman when you draw this picture andwhen you applied Tangent on both of the triangles you said that both of the angles were equal to theta well i want to ask that if we separate these theta as theta1 and theta2.will they will be also equal to each other after considering them as theta1 and 2 :)

[Xlaxsauce]

you messed up on your angles, the hypotenuses would be 1m and 2m. they stay the same length but shift an angle theta

[IveSoGotThePow]

im in grade 7.. and its pretty confusing but i understand a little... well done though

[MozillaEgg]

I think the instruction is wrong. There are no way that degree is 90 degree. The length of is 1m and 2m and the ending length is still 1m and 2m so there are no way that angle is 90 and therefore it cannot use tan(theta) to calculate.

[hanansleman]

@MozillaEgg i agree with u !!! thats what i was just saying !!! :)

[parklinkin52]

Amazing how smoothly and intuitively you introduce moments... You are incredible sal..

[parklinkin52]

My mind is blown by this fact of nature... How the hell is this possible? Maybe there is a god... He was definately a mathematician..

[kbdalcour18]

@parklinkin52 mathemaphysicist? haha

[parklinkin52]

How could this possibly be too complex? View the other videos before this one you lazy bastards...

[Gaiacarra]

Yeah I would have gone with similar triangles.

[willraytaylor]

Too complex - Very complicated all round. Use similar triangles instead of all that trig., same angle twice as large. Very complicated all round. Also your argument is circular. You assume the conservation of energy is the same at the conservation of work done and that is what you prove.

[MisticalWater]

@willraytaylor yes too complex, I didnt even take triginometry. but all of your other vids are very use ful

[MarvelsofaLifetime]

@willraytaylor: Feel free to correct the assertion I am about to make, but your comment puts me in total ambiguity. How could conservation of energy and conservation of work not be the same? Energy and work are the same thing: energy is the ability to do work, and work is the energy used to do work. These are two phenomena are intrinsically the same manifestations, they can’t be different, so I completely failed to see your point.

[sharikokaine176]

Mr. Khan, even if you're lifting the object upwards, how can u have a 90 degrees triangle. Because i mean, the lenth of the lever didnt extend or anything, it's the same lever. So, even if the lever turns upwards, it has to move in a circular motion.

Another way u can look at it is, it's like a clock. 1 m = hour hand 2 m = minute hand,

it's just turning around like a circle. having 90 degrees thr is actually impossible.

[LennyM]

@sharikokaine176 you're absolutely correct, but despite the trig error he is still correct because the proportions are still the same. The proportion of the sin(theta) to 2sin(theta) is the same as tan(theta) to 2tan(theta). (1:2 is still 1:2)

[uzamabinladhan]

great...great...you are my master...........

[matrixener]

honestly sal, this is amazing. i dont know if you respond to comments but thanks. i have a physic exam in 40 mins. and i knew nothing. i had NO idea you made physic videos......i knew you made calculus videos, which helped me alot last semester....i wish i would have know about these physic videos earlier but thanks much sal. i appreciate it. you explain it so well

[calvinhobbesliker2]

Isn't the force times distance equal to the torque?

[oliver54321]

force times distance is work, buddy

[mojaven]

should have used sin instead of tan... but you get the same answer in the end.

[erinashleyx]

this helps explain it so well, thanx sal!

[habsfan12325]

thx this help a bit for a very confusing test on mechanical advantage

[CanadasWonderland08]

thnks you helped me study fopr my test

[echocompany540]

are you in advanced class's

[marcellohro]

it`s easy to just apply the formula, but it`s hard to understand where the formula comes from.

[Verradonairun]

@marcellohro that would be the inductive method...you gather the data, insert it in a graph, and you use simple 9th grade mathematics to solve the problem.

[benjoandrichie]

your learning physical science not physics