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Archive for the ‘Physics Help’ Category

February 19, 2015 · by physics · Bullets, Physics Help, Physics Problem Solver

Problem:

You set up a ballistic pendulum in order to conduct the experiment. The pendulum is made of a block of wood suspended from a set of strings. You fire the bullet into the stationary block and measure the speed at the combined bullet and block since the bullet lodges inside the block. I certainly would like to see these kids shoot a gun into the block, here for the experiments. I don’t know. You measure the mass of the bullet to be 4.2 grams, the mass of the block to be 500 grams, and the speed at the combined bullet and block to be 6.75 meters per second. Calculate the speed of the bullet (muzzle speed) and give your answer in meters per second.

Raw Transcripts

This is Tom from everystepphysics.com and everystepcalculus.com I’m going to an experimental problem in physics that they give you to experiment with in doing the lab class. And let’s get started. You set up a ballistic pendulum in order to conduct the experiment. The pendulum is made of a block of wood suspended from a set of strings. You fire the bullet into the stationary block and measure the speed at the combined bullet and block since the bullet lodges inside the block. I certainly would like to see these kids shoot a gun into the block, here for the experiments. I don’t know. You measure the mass of the bullet to be 4.2 grams, the mass of the block to be 500 grams, and the speed at the combined bullet and block to be 6.75 meters per second. Calculate the speed of the bullet (muzzle speed) and give your answer in meters per second. So, let me show you how my program would do for this lab thing in your homework a little bit, maybe. Physics to get to my menu. Scroll down to bulletin and pendulum which is the subject matter here. And we’re gonna wait for load. Notice when things are loading, you get a busy signal.here on your calculator indicating that is loading. And if it’s a long program like this one take a little bit in my but only once. After that, it loads very quickly. And they the bullet is going to embed into the block or the wood. So it’s, bullet in. We’re going to choose that one. And we want to get initialvelocity of the bullet. We’re going to choose that. And they give you instead of height, sometimes they give you height which there’s a way of calculating that and there’s also the velocity block and bulllet. So that’s what they’re giving, choose number two. You can choose the numbers before these items. And we’re gonna enter the mass. You have to press Alpha before you enter anything in here. Alpha 4.2 is given, 4.2 grams. It’s a very small bullet. And the 2 is here I just haven’t indicated it but it’s still in the calculations.  And then we’re going into the mass of the block. Alpha 500 grams goes here. And the final velocity is alpha 6.75 meters per second, number three. In the positive direction. I always show what you’ve entered so you can change it in case you made a mistake and don’t like it. I say it’s okay. And here’s the calculations, here’s the formula. All the variables are put in. Notice it’s very clear. Initial velocity of one. Notice initial velocity, the used ot have a lot over professors use VO, which meant original velocity. But now lately they’ve been using initial and I like initial. And of course one is the bullet and two would be the block and bullet. I make everything clear of what in my programs of what I’m talking about. It always bugged me in physics that they throw around letters and minus signs and everything else and you don’t know what is going on. But in my programs , you do. Here’s the calculations. Here it is110 meters per second. Pretty neat, huh? EveryStepPhysics.com Thank you

February 16, 2015 · by physics · Bullets, Help with Physics, Physics Help

Question:

A gun with a mass of 2 kg fires out a .01 kg bullet with a muzzle speed 1,000 m/s. The bullet hits a 10 kg block resting o a horizontal surface. The block and bullet (embedded in the block) slide across the surface. If the coefficient of friction is .06. How far does the block slide?

Raw Transcript

Hello, everyone. Tom from everystepphysics.com and everystepcalculus.com. I want to do a physics problem off of a test that was, with respect to you know a bullet in a block sliding on a surface and how you find the how far the block slides. So here’s the test problem. A gun with a mass of 2 kilograms fires out a .01 kilogram bullet with a muzzle speed 1,000 meters per second. The bullet hits a 10 kilogram block resting o a horizontal surface. The block and bullet (embedded in the block) slide across the surface. If the coefficient of friction is .06, how far does the block slide? It’s irrelevant how much the gun weighs. So, that was in there to trick you, of course as if physics wasn’t hard enough. So let’s get started. Physics to get to my menu. We’re going to scroll down to bullet and pendulum. And bullet is is embedded in the block after the it has launched. It’s on a surface. And there’s friction and we want to find distance, number two. We’re going to enter the mass. We have to press Alpha before we enter anything in these at these entry lines here. So the mass is Alpha point 0 one kilograms. And the second mass Alpha is .01 kilograms. Initial Velocity is Alpha 1000 meters per second. And the coefficient is Alpha point 06. I always let you look at something to see if it’s correct. I say it’s correct. You can change it if you want. Here’s the formula. As you write this on your paper and you add the variables here. I always was like to show everybody what I’m talking about. Distance sliding for D. And here’s the calculations and here’s the answer .847 meters. Pretty neat, huh. everystepphysics.com.

September 26, 2014 · by physics · Acceleration, Physics Help

A European sports car dealer claims that this product will accelerate at a constant rate from rest to a speed of 100 kilometers per hour in eight seconds. What is the speed after the first five seconds of acceleration?

Raw Transcript
Hello, Everyone. Tom from everystepphysics.com and everystepcalculus.com. I going to do another physics problem. I’ll read it. A European sports car dealer claims that this product will accelerate at a constant rate from rest to a speed of 100 kilometers per hour in eight seconds. What is the speed after the first five seconds of acceleration? So, let’s do it. Physics to get into my menu. Open closed parentheses. That tells a calculator you want to do a program. And we’re going to go because I want you to circle things, what’s asked for in the problem and I want you to write on the right, I want to write was given so you keep clear mind of everything. In this case was speed. Speed velocity is the same. Just for your information, velocity is a vector can be negative or go in any direction. Speed is a scaler and it’s only positive, you can never have it negative. But otherwise they’re essentially the same. So we’re going to, I’m going scroll up to go to the bottom on the menu here and I’m going to scroll up to speed. Right there. And then we choose what’s given. Well and what’s given is final velocity in time. So I’m gonna go up in the menu here and see if that’s in here. And here’s velocity and time, right here. Choose that. They’ve given you initial velocity or final velocity. So you press Alpha, press Alpha first before entering anything into the entry lines. Alpha 100. And notice they give you kilometers, change the meters per second. So I do that for you. You write this on your page do the conversion. And is acceleration given? No. No acceleration is given. Okay and then Alpha. Alpha and what time was given. Eight seconds. So then I do the acceleration for you here it is right here. And then is another time given. I say yes. So I’m going to go Alpha five. And here’s the answer for the test problem. 17.4 meters per second. Pretty neat, huh? everystepphysics.com Go to my site, buy my programs and maybe subscribe for more videos. Thank you

September 23, 2014 · by physics · Displacement, Physics Help, Physics Test Questions, Physics Videos

A cart is given an initial velocity 5 meters per second and experience’s a constant acceleration a two meters per second square. What is the magnitude of the carts displacement during the first six seconds of its motion?

Raw Transcript
Hello, Everyone. Tom from everystepphysics.com Here’s a test problem. I’m going to read it for you. A cart is given an initial velocity 5 meters per second and experience’s is a constant acceleration a two meters per second square. What is the magnitude of the carts displacement during the first six seconds of its motion? I always want you to in these problems to circle what’s ask for. In this case displacement and I want you to write on the side of the program what’s given. Which is in this case initial velocity acceleration in time. So let’s do it. Put physics in here with the open/close parentheses to get to my menu. We’re going to scroll down to displacement because that’s what it asks for. I’m going to choose what’s given which is velocity acceleration in time. There’s a formula for it. You have to press Alpha before we enter anything into the entry lines. So the initial velocity is Alpha five and meters per second. I do the conversions. Is acceleration given? Yes. Acceleration Alpha 2. And the time is Alpha 6. I always show you what you’ve entered. You can change it if you want. I say okay. Here’s the answer. Letter C, on the test. Pretty neat, huh? everystepphysics.com Go to my site, buy my programs and subscribe to me so you can see more movies. Thank you

October 25, 2012 · by physics · Physics Help, Physics Videos

 

Atwood Machine Video Transcript

Atwood machine,
two masses hanging from a frictionless pulley, one on each side of the pulley,
and finding acceleration

To get to my menu
You have to press second alpha on the Titanium to enter letters in the home
screen, and then you enter the letters p h y s i c s

press alpha again to enter the closed parenthesis
Press ENTER and you’re into my menu

You choose by either pressing the number two or scrolling down to it.
And you press one to go to acceleration again

choose two to go to Atwood machine

For the Atwood Machine Physics Problem, ya know, pulleys with mass
Enter mass one by pressing alpha first

Enter mass two by pressing alpha again, let’s say nine
Then press enter

You write this step by step answer on your test paper or homework to complete
the problem
You always write the formula first, which I show you here
Pretty neat huh?
Everystepphysics dot com, go to my site, and scroll down to the outline of what
problems in physics are available for one low price, all one hundred percent
guaranteed.

October 20, 2012 · by physics · Acceleration, Physics Help

 Raw Transcript

Ok, a video on physics help.  You’ve searched for that so here it is. My programs are one of a kind in the area of physics as far as I’m concerned, there is none like them, and they’re not designed to teach you they’re designed for you to pass a physics class. You and I are not interested in the conservation of energy, or masses moving up or down a ramp, or Newton’s second law, even though to me, in my studies, Newton was a God. Remember a physics class is scored on curve and potential, or partial credit, and in my physics class, the curve was twenty seven, and I got an A, with a twenty eight, do in most part to my programs. In physics, physics problems ask you to find something, like acceleration, force, work or something, and then it gives you some variables, ya know like mass or velocity to work with. Well in my programs, you use my menu to what is asked for to find also, and then I give you the choice of variables because of the different formulas involved. So let’s get started. Uhm in my, I’m going to go back to the main screen here. You’ll notice the physics with the closed parenthesis, you have to push second alpha, and then put the letters p h y s i c s in there, and then you have to press alpha, and then put the closed parenthesis in, and then press enter, and up comes my menu, and this menu has many, many things, you can see the arrow here which goes way down to all kinds of things, fluids, hydraulics, center of mass, anything you might, ahh I can’t get everything in there because of the Titanium’s restriction on memory, ya know memory, allowances, so, but anyways let’s do a quick example here. Lets go to acceleration, and we’re going to put acceleration in. now when you go down the menu, here’s the arrow again, you can go way down here, you are given many, many choices for acceleration, all kinds of different formulas, and you pick out the one given in your problem. Let’s say that it gave you this one here, number eight, you can press eight and it’ll go, and I always show you this, a equals acceleration, this is a funny a, not a real a, it’s designed to do that in physics books, and here’s the formula, and ah, we’re going to enter the mass, let’s go, you have to press alpha before you enter anything, let’s go fifteen, I always give you this, this is pretty neat because I’ll give you all the choices for, sometimes a problem will say grams, or sometimes it will say kilograms, uhm and I give you those choices as you go through any problems or programs that I have. I’m going to say its kilograms, I’m going to show you how it changes in a second. And then let’s put an angle of twenty three degrees in there, and there’s friction force, we’re going to push alpha and then put forty five in there, newtons, and I show you what you’ve entered, but let’s just for experimental sake, change the fifteen grams, let’s say, so I’ll give you that choice, let’s go back and change it. And we’re going to put the mass of alpha fifteen, and let’s say that it’s grams this time, ok? And then we’re going to enter our angle which is alpha twenty three, and then our friction force which is alpha forty five newtons. You notice that I’ve changed it by dividing by a thousand, you can mess that up in your test or homework, so I do that for you, for me also, these programs were designed for me first remember? and we’re going to say ok, so here is, and you write all of this down, a equals acceleration, here’s the formula first, you put in the gravity, you put in the sign of twenty three, minus forty five, is the friction force, and here’s the mass, and etcetera , and you just go through it and put it in here, and you come up with the answer, minus two nine, nine, six point two meters per second squared, anytime you are dealing with friction force, I don’t mean to teach anything but, it’s negative because it’s opposite of the friction force, so pretty neat huh? Check out my site, check out my programs. www.everystepphysics.com