3 turns of a screw driver moves a 2” screw down 1/8“. How many turns to lower the screw 100%?

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Күн бұрын

How to solve a rate and proportion math word problem.
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Пікірлер: 79

@MrMousley 10 ай бұрын

3 turns is 1/8'' 24 turns is 1'' 48 turns is 2'' It will take 48 turns of the screwdriver to drive in the screw all the way.

@larrygoldstein9383 7 ай бұрын

❤ 8:47

@antennaist 4 ай бұрын

Right ON !

@kennethwright870 10 ай бұрын

3 turns:1/8” requires 16 of those units to yield 2”. 16*3 turns = 48 turns

@warblerab2955 10 ай бұрын

At first I thought the answer was 45 because I thought was how many more turns to completely lower the screw after it had already been lowered 1/8".

@markashlock9017 7 ай бұрын

I thought the same thing, but wouldn’t that be 42? I’m terrible at this stuff : (

@warblerab2955 7 ай бұрын

@@markashlock9017 sorry, that is incorrect. If the screw is 2", it means the screw go down 2" to lower all the way. If it has already been lower 1/8", it still need to be lowered another 15/8". Since you do 3 turns to get the screw 1/8" lower , You do 45 turns to lower the screw 15/8". (3 for every 1/8", 15/8" , 3 *15 is 45.

@bradlewis8036 10 ай бұрын

Since you’re going by 1/8’s of an inch per 3 turns. You then take how many 1/8’s of an inch are in 2 inches. And that’s 16. Multiply that by the number of turns per 1/8 of an inch, which is 3. 3 times 16 is 48, is the number of turns you have to make to have the screw go 2 inches. That’s how I got the answer.

@Vipre- 10 ай бұрын

I did the same thing, but it's fun to try and guess the "correct way" sometimes. I figured it'd be X/something times something/something

@bradlewis8036 10 ай бұрын

@@Vipre- right!! But that’s how normally functioning people do it. What’s John’s attempt is teaching high schoolers going to or aiming for college. And I’m sure that he’s filling in past school age people that wanna know the full explanation for better sureness of why they are right and the proof to anyone that would need to know the maybe required answer. I see where you’re coming from, but I also see what the creator of this KZbin channel is covering. And since he is a Middle and High School teacher, it’s just in his natural thinking to cover all bases to ensure that as few as possible don’t know or understand the teachings. But I also have fun attempting the taught n different way for fun too. Ha Ha.

@chrissupport 10 ай бұрын

8*3*2=48 turns... them's some FINE threads...

@vincentrobinette1507 6 ай бұрын

Actually, 24 threads per inch is very common for 3/16" to 7/16" diameter bolts.

@frowe327 10 ай бұрын

48 turns.... at 3 turns per 1/8 in increment, , there are 16 of these increments in 2 inches.Therefore, 16 x 3 = 48 turns total... 45 more than were initially done.

@GetMeThere1 6 ай бұрын

I thought about it slightly differently. If 3 turns = 1/8" then 1 turn - 1/24". So 48 turns is 2". I think that's slight different than the solutions below. For me the natural way is to figure out ONE turn, and then calculate from there.

@prideofdurham4776 9 ай бұрын

48 turns? Nah after 3 turns out comes the hammer!

@ericgossard8808 10 ай бұрын

@bierbarrel 10 ай бұрын

I dont know. My Dewalt moves much too fast to count them.

@ddgyt50 2 ай бұрын

ROFL! :D

@thomasharding1838 Ай бұрын

CRAFTSMAN!!!

@knutholt3486 7 ай бұрын

I see these videos to exercize solving such things in my head without writing up a lot of formal math and I got it in two steps. First (1/8)/3 gives 1/24 Then 2/(1/24) gives 2*24 which is 48.

@Dr.Pepper001 10 ай бұрын

This one is easy. You take the log of 1/8 divided by the square root of the diameter of the screwdriver handle, then multiply the length of the screwdriver by the pound torque of your left hand. Add the results to the age of the person handling the screwdriver and raise that to the 16th power, and solve using the quadratic formula, which leads to answer which is 842,112 turns.

@PhillipRhodes 10 ай бұрын

That only works if you reverse the polarity of the neutron flow first, and thread the screw into a base of prefabulated amulite. Otherwise side fumbling of the dingle arm will kill you and the capacitive duractance will leak from the spurving bearing.

@1959Berre 8 ай бұрын

Depends on how deep the screw was in the first place.

@vincentrobinette1507 6 ай бұрын

Technically, the screw started 1/8" in, which took the first 3 of the 48 turns necessary to set the screw the full 2". The way it was worded, 45 should have been the correct answer. However, stating that the screw sets 1/8 inch in 3 turns, merely defines a rate, not necessarily implying that the screw was already turned 3 times, to take that measurement.

@russelllomando8460 10 ай бұрын

got it, thanks for a good one. 8 x 2 x 3

@bluejedi723 10 ай бұрын

what situation would I need to be in to need to know how many turns of a screw will lower it to 100%

@frowe327 10 ай бұрын

One in which you are being tested for your ability to solve practical problems.

@bluejedi723 10 ай бұрын

@@frowe327name one job where my job duties would include knowing how to solve this is an essential skill

@chestermarcol3831 7 ай бұрын

Given the wording of this problem, 45 should ALSO get full credit.

@SteveSearle 10 ай бұрын

2 turns per minute of this extremely strung out explanation

@thomasharding1838 Ай бұрын

Is that a 2 inch diameter screw or a 2 long screw?

@michaelanjin1327 10 ай бұрын

I’d guessed at 45 because the screw was already 3 turns into the stock.

@tomtke7351 10 ай бұрын

GIVEN: A screw •that's 2in in length •that seats 1/8in in 3 turns FIND: how many turns fully seats the screw. RATE OF screw engagement: i.e. inches/turn 1/8in÷3 turns = 1/24in/turn COMPLETE SEAT OF SCREW: 2in÷(1/24in/turn) = 48 turns VERIFY: 48turns×(1/8in/3turns) =6in/3turns =2in❤✔️

@raynewport9395 7 ай бұрын

Are we assuming you keep turning the same way?

@mylittlepitbull3143 10 ай бұрын

1 MILLION dollars. Something a little harder please.

@thecalculator80 Ай бұрын

A very sharp 12 year old kid is going to note something quite relevant, not noted in the Comments below. I suspect that everybody is assuming that a "turn" is a full turn. I suspect in the operation of the screwdriver that each "turn" is far less than 360 degrees. My guess is it is less than 180 degrees. So, three "turns" is really 1.5 turns of the screw itself, and 24 screw turns are needed. So the screw is really a very coarse screw, approximately 12 threads per inch. (Do I need 24 minutes to explain this?)

@CV-uy1jc 10 ай бұрын

I did this one in my head 3x8 per inch = 48 turns

@1234larry1 4 ай бұрын

You might want to say cross multiply instead of cross product unless you’re talking about an operation on two vectors.

@yeshitellaaleme4419 10 ай бұрын

48 turns to screw 2inch deep.

@ChrisS-sw1ll 10 ай бұрын

Jeez I feel sorry for his class! What if he had to explain something difficult?

@gabe9100-r2x 10 ай бұрын

I can do this in my head. No paper and pen. 48 turns. Too easy.

@kk6aw 10 ай бұрын

48 total or 45 more turns

@alanknollmeyer9904 10 ай бұрын

why does it take 24 minutes to explain a problem you should be able to solve in your head? This site is much too wordy.

@Jeanne90275 10 ай бұрын

@zweisteinya 8 күн бұрын

Is it a Flathead or other type of screw…2 inches is ambiguous - the question is faulty // Flunk ‘The Academy’

@robertking2809 10 ай бұрын

Ok teach, I began watching your video on learning basic fractions and its no wonder don't understand this because it's never explained in the use of everyday situations. Your example: 2/3 × 1/5 == 2/15. Well what does 2/15 even mean??? Use an example like a pie. If you have 2/3 of a pie and 1/5 of a pie ( and why you would want to multiply this anyway I don't know why) but you just say " here's your answer ". The students are left wondering what does 2/15 even mean in relation to the pie. Use real life situations and show examples so students can see and understand how this is even practical.

@michaelanjin1327 10 ай бұрын

Why take the screw out and put it back?

@frowe327 10 ай бұрын

No one said anything about taking it out and putting it back… What is your point?

@jeanlemire2681 6 ай бұрын

Why take 24 minutes and 15 seconds to explain such a simple problem ?

@douglee2987 10 ай бұрын

@gaia2uwilson 10 ай бұрын

48 total turns

@keithschipiour4684 10 ай бұрын

I don’t know I use a drill.

@williamlynch1929 10 ай бұрын

48 turns!

@thorstambaugh1520 10 ай бұрын

Except in real life you will find it isnt exact. Comment below as to what factors in real life would alter this

@chestermarcol3831 7 ай бұрын

I know that torquing a screwdriver 48 times to put in a 2 inch screw, is definitely a waste of time. just get an impact drill. Your wrist will thank you.

@doctorartphd6463 10 ай бұрын

If someone is doing this math and don't know what a screw driver is, then we have bigger problems !!!!!!! Geeze, John.....

@terry_willis 10 ай бұрын

Good point.

@lawsonspedding6136 10 ай бұрын

48 turns = 2 x 8 x 3 = 48

@RodCalidge 10 ай бұрын

Depends on how much of it is threaded. DUH

@pietplezant 10 ай бұрын

It is not 48 complete turns! It is more about 25 turns A hand can max turn about 180 degrees So better say turns and not complete turns

@meatdog 10 ай бұрын

Hiw far are the turns? Everyone uses. Screwdriver a little different and twist it dufferent distances so there is NO RIGHT ANSWER!!

@bierbarrel 10 ай бұрын

Your parents have any kids that lived?

@davidgibbins1504 10 ай бұрын

48 turns

@Mrskateboardboy 9 ай бұрын

48?

@perssoh11 6 ай бұрын

Jesus Christ.... how looooong can a solution be?

@sergiochacon5038 10 ай бұрын

I say 48

@Megamundo28 9 ай бұрын

Why over complicate the explanation by referring to mph or gallons whatever. Its simply number of 1/8 inches in 2 inches multiplied by 3. Waffling on means people lose interest. Stick to the point. These long winded explanations which keep going off topichave convinced me to unsubscribe.