Video Gallery

Math Applications Week April 06

Go to Video Gallery Added Apr 06, 2020 •

Copy this URL:
Embed code:	<iframe class="edlio-embed-player" type="text/html" width="640" height="360" src="//www.westgateschool.org/apps/embed/?v=249784" frameborder="0" allowfullscreen></iframe> Change dimensions

Go HD

This is the lesson for Math Applications the week of April 06 - April 10, 2020.

Show Transcript

good morning everybody or good afternoon or whatever time you happen to be watching this happy midnight for all I know welcome back this is the video I'm going to be doing a little bit more physics unit continuing with more today most of you would have probably seen the other videos by now right talk about like the general setup of this will happen is just like today every week email a T-Mobile have a video it may or may not have a PowerPoint PowerPoint so we see won't we don't have one today I'm going to show you everything you need on the 14th of August 1st doing assignments what you'll do is just work I said email attached whatever assignment you did you can the one this week is a worksheet if you have the ability to can print it out right on the worksheet and then if I take a picture of it and email it to me is that doesn't work so well for you you can take another sheet of paper ride out your answers or take a picture of that I think that's about it I just got the receipt for you guys this week it's three pages typically 25 problems but don't let that dissuade you numbers one through 10 or just true-false a lot of the answers to the way to get started computer heater so it's facing my board a little better so we learned do weeks ago that momentum first of all momentum for some reason in all of its equations is Pete I still not sure why people's momentum but that's beside the point but we were in momentum is equal to MB MB Mass V beam velocity a lot of times when you're doing these problems velocityville just be they might just use the words know that for all the problems we're doing right now speed and velocity are the same thing if you see the word speed you can fit it in for velocity so for now we'll receive velocity equals a couple other things you should know water X in physics you'll see a triangle triangle math or triangle what that means is the Delta and means change if you see if a triangle has a change in math if you see triangle velocity means there's a change velocity I don't believe that sums up amazing for working with today but it's good to know we'll be talking about changes in momentum changes and Masky doesn't belong today just know that if you see that that's what it means going to erase that so most of what we're doing today is just find some situations involving momentum first of all is since momentum equals mass times velocity if either of these change in momentum also changes changes in velocity changes momentum will change you can have two objects with the same mass you can still have different items because her velocity can be different The Flipper that is also true two objects can be going the same speed they can have the same velocity but if their masses difference might have two objects with the same you might have to tobacco shops nearby worst example ever but I can throw this cup and if I throw it at 5 miles an hour versus if I throw it at 10 miles an hour you can probably cast of the one that'll have momentum is flying 10 miles an hour if you would like you can imagine we threw it out the window but then again we have an elephant going 10 miles an hour by doing 10 miles an hour in that case because the elephant has more mass it still has the greater velocity Earth's Right leader little bit more with that is either one of the questions addresses if an object collides with another object does the momentum change now we can look at that reasonably let's say my mass will stay the same assuming I didn't like losing Arbor anything so in that respect my momentum would stay the same however my velocity unless I'm the Juggernaut I probably stopped when I hit the wall to wall with me I probably at least slow down so if something to lies with another object it will lose a little velocity perfect Universe in a perfect frictionless Universe all energy would be conserved like I could hit something may be bounced off and be going to exact same speed however we do live in a perfect Universe even if you hit something with Ricochet off you going to lose just a little bit of objects that so if you collide you lose momentum I knew that would be the answer 20 or one of your question some other questions that come up have to do with if you say double mass or double velocity how does that affect your moment let's see for scenario 1 we have 5 kilograms let's say we have a velocity I've been doing momentum the units for momentum change depending on what he's our Maslow is be kilograms velocity in the most common when you're probably see those meters per second do I say we got five kids what they were going by 4 seconds soap equals MV mass times velocity of 25 meters over that's enough double one of these and see how much it changes so let's double the map what's a mass is 10 mg of salt velocityville state math is now 50 meters over seconds so sure enough when we double the bass momentum also doubled it looks like if we doubled velocity you do the same thing because if this was five in this was 10 x 10 would still be 50 so if momentum double strike if master momentum also doubles if velocity doubles so like now we would have 10/10 would be 100 so if they both double looks like we quadrupled 25 up to 100 make sense this * to this * 2 those two times each other is 4 * 25 * 4 is 100 what's the few things that don't affect momentum so we know from our equation the only two things that affect momentum mass and velocity it doesn't have anything about Direction it doesn't have anything about so if anything changes other than mass and velocity it doesn't affect momentum something that is going north with a certain momentum it is going south with the same momentum like the same speed the same mass to have the same momentum so only mass and velocity the only other thing I want to show you today is in regards to the speech or to tell you a bit of a how to split up. There's three sections the first section is just the true false has questions about momentum the second part is just a woman some calculations you're giving a mass you given a velocity it's the last part has some variations on P equals MV so I hear these have all been problems where we have mass we have lost you can figure out if you have to with a variable speed in figure out this third one so for instance what is I wanted to solve for Mass in that tastes like if I was getting M on it I would like to buy both sides by V mass is equal to momentum over velocity be separated out to be Rossi starting back up here we do a similar thing we are just divided out so all three of those are the same equation they're just rearranged depending what you're given also Windows problems you are given a word problem and then you have a bunch of boxes and ask you something like what are you giving what are you looking for in that case just spilling this information you need what you're giving if you can read this because it's small little bee on the sheet basically what you're giving then what equation you'll use and then here's where you'll do your working at your solution so for instance if I was doing a problem that hold me a momentum of 10 and I had a velocity of 2 and I was told I need to find a day I drank here what am I doing well here I'm giving people stand g equals to what do I need I need mass m please do I use the equation where I have pmdd GM looks like this one and this what we're looking for we have P / V what do m equals c over B m equals p over V equals 10 / 2 equals and that's pretty much it that's everything you'll be doing today or this week there will be one more question similar to those of the very very end of the sheet it'll look at things from a slightly different angle but I'll let you anything too drastic can you let the sun go get the sheet on your email it to me in whatever way is best for you either filling out the sheet and uploading it just doing it on paper and uploading that are you just putting your answers to work. if you do it on your own paper or the word document please just make sure that you written it out somehow so I know I can clearly see what what two and three are so small thing when answering the true false questions please make sure it looks like a t or F Adidas before red light true or false and you're like I don't know we're going to do this fancy thing with that tiny little knots in the middle that could be either a t or an F don't do that dearly dearly don't make me do that guessing game on this park around I believe that is it I'll talk to you in on Monday if you need me for office hours because you have questions about this for material from other classes you should have my info checking in from 9:30 to 10:30 using Zoom info on Tuesday or Wednesday have a great week

Video Gallery

Math Applications Week April 06

Popular Videos