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ESPN Running with Momentum

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Video on momentum viewed on 11/30 that corresponded with the assigned questions

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I got momentum Napoleon I mean your 5 9 185 lb I mean you just you don't what's the momentum of say say a Dorsey Levens hey man I got momentum listen to me I would say yes but it's not me it's the you guys you know the suits of the network they're telling me I got to do a show on momentum I got to find a running back with momentum  I got momentum sports figures put your turn the game usually when we think about collisions we think about cars Bruce Lee collisions are a big part of football too who is Jensen are also a big part of sun in physics Whenever two objects come together we have what scientist called  the coolest collisions can be big Boise Mall  Whenever two objects come together we have a collision and you can't have a collision without woman size is pretty important football right like if I weigh 500 pounds I can probably move this thing pretty easily cuz I'd have a lot more weight to throw at it religion football all the time that makes sense right something heavier smashes into something lighter and the latter object moves that's because the heavier object has more momentum show us how do you explain this Napoleon only weighs 185 lb Defender weighs 310 lb when the two of them Collide how could Napoleon score  smaller player have enough momentum to push package skin Defender and score  who's got back behind me is a pretty heavy duty object his name is Napoleon Kaufman and he's a running back for the oath Raiders last year he broke Bo Jackson's team record for yards in a game with 227 yards on 28 carries turn 85 lb these are the smaller side for an NFL back so how does he take the pounding from all those Defenders what are some of the advantages and disadvantages to being to being a smaller back then I fell can see how big the linemen are in this league you know we can kind of hide behind the big guys you don't and another thing is the speed Factor you know a lot of the linebackers Arjun now there's some of that are fast but not as fast as some of us so it's indefinitely PlayStore advantage where's all the time that's definitely not the obviously lining up most of the time 6 7 yd deep generate enough the plow into these guys and break tackles and you know a lot of the small backs are really doing that lately because of the speed factor and because it affected you know we get a chance to to get a head start at the Grand get some steam going through something like that momentum is around us all day everyday now if we have more than one Menton we call it momentta that's plural for moment you see everywhere you look there's no method because anything that's moving has momentum if I'm moving in a straight line we called linear momentum linear linear no I don't busy Mama short like the quantity of motion what time it is how much an object wants to keep moving and the more momentum you have the harder it is to stop and the more hurts and something stops you a little momentum a lot of momentum the quantity of motion momentum what's up did Reagan have his coming right at us we know instinctively that it's got a lot of momentum and we know to get out of that's why most football players are so big the bigger size gives them greater momentum when they're moving  bowling ball in the soccer ball could I have the same moment no way way Marquess I'll show you how is that not real hard it was going so slow there then how much momentum how is that okay  Phantom so what does that tell us it was going faster so momentum depends on both speed and correct it looks like this momentum equals mass x velocity so the amount of momentum an object has is a function of both its weight its mass and its speed its velocity romantic looks like in an equation a lowercase p now why a p I have no idea it just gotta memorize that equals moment C equals P equals MV or NV equals P MVP well I have no mint I have mass and I have a locity so I must have momentum and we can figure out my momentum we just have to multiply mass by the last week now there's something really sick about momentum if there's no outside force to change it the same thing just keeps going and going that's called the conservation of momentum in physics momentum must be conserved  I don't have momentum I'm stopped well what happened I'm outside force affected My Moment In this case it was the friction of my wheels friction is a force that affects momentum because momentum is conserved it can be passed from one object to another the momentum is passed from one ball to the next now with no side forced to affected the momentum can go on forever  when a player in motion hits a stationary player and they stick together like this they become one that's call the stinking Collision the momentum stays the same but now they have a greater mass because we  what is safe making this last after you make contact actually Napoleon it's your speed that's less your momentum stays the same now we can figure it out we're just a little math we're going to multiply Chelo's by meters per second football is pounds in yards forget all that metric stuff you see if we have to figure it out with slugs you don't want to know we can find a number for The Defenders momentum before he makes the tackle and after he contact we know the Defenders weigh 290 lb or approximately 130 kg Divine is velocity will use the video frames each frame is one 30th of a The Defenders move in a foot for every 30th of a second so 30 ft of second or 9 meters per second so we have mass and velocity multiply and we get 1170 kilometers per second look what happens after they make contact because they stick together they're now moving as a single Mass we have the Defenders mass in the running backs Mass to get a new mask of 214 kilos that's 471 lb we figured out there velocity 5 467 meters per second * our new velocity we get 1170 kilograms meters per second the same amount I had before the momentum is conserved the momentum before a collision is the same after Collision against the ground will say he did if he did the moment there's no outside force the moment room stays the same football field it's usually both players who are moving right let's say we had two players with the same mass and they hit each other with likely the same velocity in opposing directions  what would happened let's go to the sports figures Blackboard and take a look anytime of defensive lineman and an offense of lineman go head-to-head you have a collision of Major League proportion Wayne in the neighborhood of three hundred pounds each these players carry a lot of momentum so what happens when they meet they both get off the line equally well so their velocity is the same when they meet offensive lineman has momentum in this direction will call that positive and the defensive lineman has momentum in this direction will call that negative when objects Collide we can take the sum of their momentum to figure out what's going to happen when they hit head-on we add there to momento to get zero they stop two big players one big Collision you add them up you get one big zero they're equal in opposing momentta cancel each other out it's all in the numbers I'm work Malone at the sports figures Blackboard  all that stuff worth when you hit each other head-on but most of time it's not that way we hit each other at Angles right but the momentum is still conserve shown the point what happens when you're running and a Defender hit you at an angle moving but in a different direction and the Defenders okay so what are we got here in this direction the defensive back had momentum in this direction and when it collided they went off into this direction  right now because they hit it an angle we can't send add one will mention to the other like we did when they hit head-on stop the figure out momentum in different dimensions we use arrows like this they're called Force vectors  okay this Cheryl here represents the song of our two moment to moment play together, what if Napoleon and the defender had exactly the same moment but they didn't so what can we tell turn momentum from are vectors exactly what the relative momentum for different objects were before a collision that's what this gentleman does for a living this is Steve Lovell and he's a trap investigator for the Oakland Police Department Show Steve how do you use physics in police work by recently investigator this accident coming off a residential roadway driver said that he's stopped at the stop sign preceded in the intersection and then struck this car on the side Will based on the weight of the car the weight of this vehicle the angle approach and angles of departure using momentum I can actually calculate the driver's speed to find that he's not all truthful when saying he's stopped at that's not sad down to pull in you weigh 185 lb okay so that would be momentum with velocity right is 303.8 kilos meters per second that's a lot of momentum and because I weigh less I can get up to speed faster because my nurse is nest inertia well well Napoleon even study a little physics having it so what are we learned that momentum is like the quantity of motion correct is conserve the law of conservation of momentum let's not force come on man what's the secret relax how could you relax 300 nasty pound to Derrick Thomas I mean bones are in danger of being broken limbs might be torn off and you're telling me you were lacks no way relax relax relax

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