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Archive for the ‘Tension’ Category

February 5, 2015 · by physics · Tension, Tension physics

Question:

An 1130 Kg car is held by a cable on a smooth frictionless ramp.  Cable makes angle of 31 degrees above surface of ramp.  The ramp rises 25 degrees higher than the horizontal.  Find the tension in the cable.  

Transcripts

Hello, everyone. This is Tom from everystepphysics.com and everystepcalculus.com. Today, we’re going to do everystepphysics.com stuff. A 1100 kilogram car is held in, oh they have plane here but it’s place. A 1100 kilogram car is held in place by a light cable on a very smooth frictionless ramp as shown in the figure. The cable makes an angle of 31 degrees above the surface of the ramp and the ramp itself rises 25 degrees above the horizontal. Note that the magnitude of gravitational acceleration of the earth is 9.8 meters per second squared. Draw a free body diagram for the car and find the tension in the cable. So how do we do this problem? Well, you go to physics to get to my menu. Then you choose tension because that’s what it’s asked for in the problem. So we go up tension, press Enter. And we have all these choices. We’re given to angles and one mass. In this case, we would choose number three. We put in there the mass of the car.Alpha 1130 kilograms.
Again, the anglesAlpha 31 degrees plus 25 degrees.We got 56.Notice if the ramp angle was given, you’d be pulling just along the frictionless ground. And so that there’s only one angle given, that would be mg times sin of theta. Which is a standard tension formula. Now if you add the car going with it going up a ramp with a angle, then and the rope is pulling on car at an angle, you have to add those angles together which is 56. Now you do the calculations. Equals 9190.1 newtons. Okay. Sometimes you have to kind of..one great thing about my programs is it gives you the formula for tension. A lot of times, a really simple simple formula, you can’t even recall them because you really don’t don’t have any way of placing them together and using them. My programs give you at least the formula for tension.

April 4, 2014 · by physics · Tension

An elastic string is stretch horizontally between two fixed points 0.08m apart. An object of weight 4.0N is suspended from the midpoints of the string, causing the midpoint to drop 0.12m.

Calculate

a) the angle of each part of the string to the vertical

b) the tension in each part of the string

Raw Transcript

Hello everyone. This is Tom from everystepphysics.com. I’m going to do a problem that’s come up in any number of tests. It states in elastic string is stretched horizontally between two fixed points 0.08m apart. An object of weight 4 Newtons is suspended from the midpoint of the string causing the midpoint to drop a distance of .12 meters. Calculate a, the angle of each party of the string to the vertical and b, the tension in each part in the string. Let’s get started. You put physics in here with closed parentheses open/close parentheses to get my menu. Which I’ve already done. That’s in the instructions of my programs. And we’re going to I’m gonna go to the bottom of the alphabet here scroll up to the T section which is Tension. They ask for Tension and I’m going to go to Tension here. And, we’re going to scroll down to what’s asked for. There’s many many problems for tension but we’re going to scroll down because what what they gave us was weight in Newton’s. Here we have weight and the angle and here we have year we have Newton’s in the distance apart and distance drop. Number B. So we’re going to choose that one. You have to press alpha before before we enter anything in the entry lines here. Alpha and Newton’s weight was 4. The distance apart was .8. Press alpha first, meters. I always give you choices centimeters to meters, they trick you on that. Choose meters; that’s what they gave you. And alpha .12 meters again. I always show you which you’ve entered so you can change it if you want. I say it’s okay. And a lot of times I show you the picture like this. Notice we divided the total distance by 4. There’s one on each side. These are generally in physics, these are trigonometry problems. Geometry problems. So here we have the .12 and here we have the .4, .4. Those equal .8. And we have the theta for the horizontal here. And theta for the vertical here. In case they ask you for something different. And here’s the 4 Newton’s of weight right here. And we press enter and you notice that the vertical is 73.3 which is what they asked for. You write that on your paper. This formula here. In case they ask you for the horizontal. Which generally they do but not in this problem. It’s 16.7 degrees. And the tension is 1/2 4 because 4 is divided by each string. 1/2 of this is 2 of course. And then the cosign of 73.3 is 6.9602. If they ask for the vertical angle you you’d enter this formula. And/or if they ask you for the other one, you could enter this formula. They both come up with the same answer, 6.9602. Pretty neat, huh? everystepphysics.com Go to my site, buy my programs pass your physics classes. And also subscribe to new upcoming videos and blogs.

March 9, 2014 · by physics · Tension

Physics Video: Stretch & Tension Solved on the TI89

Physics stretch & tension word problem TI-89

Raw Transcript

hello this is Tom
for EveryStepPhysics.com I write those programs for the TI-89
titanium and other calculators in the TI system
we’re doing this problem here which is a standard problem of
tension and um
let’s get started. Of course we put physics in here with close parentheses
open/close parenthesis so that you get to my
menu press Enter and we
we can scroll down here with the cursor or we can go
up because tension is closer to the the z, I’m going to go to the bottom of the
menu and I’m going to hold the cursor down here
go up to tension there’s tension generally in any problem whatever they ask that’s
what you go to in
my menu if they ask for acceleration you go there if they ask for velocity you go there
if they ask for…um stretch
or whatever they might ask you go that problem in this case we’re
talking about tension and of course they give you in this problem a mass and they
give you
angles two angles
and they give you the distance apart so we’re going to choose number seven
and we have to press alpha before we press anything we go
alpha 800 is the mass
in kilograms
I give you these in case whatever they
give you you have a choice and the angle is
L first angle is alpha 18, and the other angle is
alpha 10
and ask if they gave you the distance apart
the distance apart generally doesn’t have anything to do with the tension because
the angles determine the tension
and the distance apart a lot of times they throw you off with that
in this problem they ask you for extra credit to get the stretch of the
strings so I would use the distance in this case but so we say
yes distance is given then I gotta go alpha
18, you notice that they try to trick you again physics they love to trick you
they gave you 18 distance the same thing as the first
angle so you know
they could give you twenty-two or something for the distance and
make it completely different so you would not be confused but
they love that in physics
and of course you got meters so you gotta go number two in
meters I show you what you’ve entered here’s 800 kilograms 18,
18 angle 10 angle and 18 distance apart
I say it’s okay
So we’re going to move on I show you a picture of it here’s the 18 angle the 10 angle
tension one tension 2 and tension 3 is the cable that holds the
mass and so we have to solve this with 2
equations I show you the first equation here
and
we substitute that into the into the other equation
write all this down on your paper don’t put a substitute equation in there were
but.. but just put the
equations on your paper and so the
tension of t2 which would be on that side on of the
picture is 15898 newtons
and the t1
tension is 16,463 Newton’s
notice the uh, the credit that you get on this problem
in other words there’s just 10 points for doing this one here
which is just the tension on the corners mass times acceleration
and thats 7848
you got 10 points for this the other ones are five points apiece five points and
there’s a
so we found the tensions in each
system there and then I go to the
stretching of the string notice we have a,
b, c which is this part of the triangle
and d and e we have 10
degrees here notice the this angle here would be complimentary which is eighty
this is 18 so this is 72 sometimes they give you these angles too
ah, but anyways we need to find the stretch so we need to find the distance of
this which is the hypotenuse and this which is the hypotenuse of the
10 angle and so
tangent of, of times b would equal
the c a+b is equal to 18 that’s the total distance apart
and so b would be 18 minus a
and just write this stuff down you can take your time and look at it if you really wanna learn it
but I was always interested in passing tests
not completely learning physics and so the
a above that a 6.33 units I use units because I don’t know if I gave you centimeters or
whatever inches or whatever they might trick you with but anyways that portion of
the triangle a is 6.33 and then we
subtract that from the 18 we get 11.7 units and then the hypotenuse
of d
which is 6.66 units and then the hypotenuse
of a 10 degree angle is 11.8 units
we add those together 18.5 minus
what we started with so the stretch is .506 units
Pretty neat huh? EveryStepPhysics.com go to my site buy my programs and pass
your physics class and also
you might want to subscribe to to me so that you get future
programs or blogs on subjects

November 9, 2013 · by physics · Acceleration, Tension

 

Tension Pulling or Pushing on the TI-89: Video Transcript

This is a video on acceleration in physics
and ah given regarding maybe tension when you
something is pushing or pulling with some tension
let’s get started you press second alpha
to put the letters p h y s i c s in here and press alpha again to put the
open and closed parenthesis press enter and you are into my menu
we’re doing acceleration here you can see the number of choices you have
and we can go for all kinds of work all kinds of things in my menus
regarding physics and press two to get into acceleration
press one to get into the next menu for acceleration
and we have the choice of generally in a test your given or asked
to find acceleration and therefore you go to acceleration
in my programs and you scroll down to something with tension
here you have tension with ah coefficient of kenetic friction
so we’re going to do that one ah they give you mass
you have to press alpha before you enter anything into my program entry lines here
press alpha put in eight give you the choice of kilograms or grams
tension let’s say alpha fourty two newtons the angle is alplha maybe thirteen point five
degrees and the coefficient of kenetic friction might
be point one seven five
I always show you what you’ve entered so you can change it make sure you got it right
from what’s given I say it’s ok
here’s the formula you write this down on your paper
physics is scored on partial credit and class curve
so whatever you write down you get credit for
but you’re going to get one hundred percent on this problem
the unknowns are put in for that formula you’re doing the calculations just like you
would on paper
write everything down just like you see it and i give it to you in fraction format
and also in five rounded decimal points to meters per second squared
pretty neat huh every step physics dot com
go to my site buy my programs
and pass physics

· by physics · Tension

 

Tension Mass, Displacement, Angle on the TI-89: Video Transcript

This is a video from every step physics dot com
solving a physics problem step by step and also demonstrating how my downloadable
programs work in your TI 89 Titanium calculator and other TI calculators
for calculus and physics problems andlet’s get started
to access my physics menu in my programs you goona have to press second alpha
and put the letters p h y s i c s in here and then press alpha and put
the open and closed parenthesis press enter and you’re into my menu
you can see how many things there are many many things here
you I have that outlined in my outline that you can receive
but uhm we’re going demonstrate tension right now
so I’m gonna go up here get to the t’s
It’s all alphebetical and click on that
and you have all these choices here what they give you
what happens in a physics test is they give find acceleration
or find tension or find work or something like that
so you go to my menu whatever word that is what they are finding
and then I put down as many variables as I have seen on a
on choices so right now were gonna
let’s do mass, displacement and angle and I can push the number four
or scroll to it with the cursor I’m going to push number four
and you have to press alpha before you put anything in these entry lines here
so press alpha eight put in eight
I give you the choice of grams or kilograms lot of times that happens
and we’re going to go alpha maybe four
and alpha maybe twelve point five degrees I always show you what you’ve entered
so you can change it if you want if you’ve made a mistake
I say it’s ok I also tell you some hints about the problem
and maybe sometimes show you a diagram but here’s the two angles and what they are
talking about in this situation and how much tension is on this line here
and so here’s the formula and here’s the way the calculations work out
you write all of this out on your paper you get a
since physics tests are scored on partial credit
class curves you’ve just got a hundred percent on a problem
and way over the other people in the class a pretty neat huh?
every step physics dot com go to my site
buy my programs and pass physics

October 20, 2013 · by physics · Tension

A 276kg glider is being pulled by a 1950kg airplane on a horizontal runway with an acceleration of 220 m/s^2 to the right. Find the magnitude of the tension in the cable connecting the glider to the airplane.

Raw Transcript

This is a video from every step physics dot com showing how my programs work on the TI 89 titanium calculator and other calculators and the TI system for physics and calculus problems. Okay, here’s another physics problem in many tests, very easy one but they’re not easy when you’re doing a test you don’t know what formulas to pull or what to do. This certainly is a system for that for getting these problems correct. 276 kilogram glider is being pulled by a 1950 kilogram airplane along a horizontal runway with an acceleration 2.20 meters per second squared to the right. Find the magnitude of the tension in the cable connecting the airplane and glider you’re pulling along horizontal plane. Therefore, gravity does not have any effect on it it’s not in the calculation if you’re pulling await up vertically then gravity does stake place in the calculation so this one gives you massive the glider in 1950 kilogram airplane doesn’t have anything to do with it because the weight is all on me and by the glider. So let’s see how my programs work on this one. So let’s get started in my programs yet the per second for the letters pH Yasi sees in here and personnel for but the opening close parentheses and press Enter in your into my menu. The problem is too find tension so there for you me the going why menu grow up or down to for medical to Kenshin tension and give you the mass acceleration so we’re gonna choose that one from this menu. Mary enter the mass you have to press l4b for you into anything and my aunt realizing these entry lines here of to 76 kilograms you could put grams in case the prime gave you something like that but I always do that give you the option for for that this is kilograms health 2.2 meters per second squared we show you which is better you can change it if you made a mistake they say it’s okay anna says horizontal and so shoes there as the airplanes point fighter-bombers way the cable and here’s a calculation simple calculation these in a senate tested you very quickly very accurately and be done with it mass times acceleration 6 7.2 news 30 every step physics that can go to my site by my programs and pass physics.