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ESPN-Running with momentum video

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ESPN video demonstrating the key concepts of momentum. Watch the video and answer the questions.

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you can find a sports figures website by logging on to go Network go.com the following program is part of cable in the classroom the service of the cable television industry and your local cable company did I can eat this for the next 30 minutes I got momentum Napoleon Napoleon listen if it were up to me I would say yes but it's not me it's that it's a big guys you know the suits of the network they're telling me I got to do is still on momentum I got to find a running back I got momentum sports figures put your brain in the game I think about collisions we think about cars right is there a big part of football too who is also a big part of Science in physics Whenever two objects come together we had what scientist called a collision collisions can be big or small Whenever two objects come together we have a collision and you can't have a collision without pretty important football right like if I weigh 500 pounds I can probably move I'm pretty easy because I have a lot more weight the pro-life preseason football all the time since write something heavier smashes into something lighter and the ladder object moves that's because the heavier object has more momentum weighs 185 lb into Fender weighs 3 10 lb when the two of them Collide how can the polian ever score clear have enough momentum to push back a giant Defender just got back behind me is a pretty heavy-duty object is there is Napoleon Kaufman and use a running back for the Oakland Raiders last year he broke Bo Jackson's team record for yards in a game with 7 yards on 28 carries 25.9 185 lb pound in from all those Defenders what are some of the advantages and disadvantages to being to being a smaller back then I fell sometimes got to hide behind the big guys in the world another thing isn't so I could get a lot of the linebackers and now there's some of that are fast so now you just blaze passes Defenders all the time that's definitely not the case you know obviously a lining up most of the time 6 7 yards did you have to generate enough momentum to plow into these guys and break tackles in the small bags are really doing that lately because speedfactory because affected know we get a chance to to get a head start at the guy and get some steam gone yeah not all the time momentum is around us all day everyday now it we have more than one anything that's moving has momentum about if I'm moving in a straight line we called a linear moment moment but now I don't easy momentum is sort of like the quantity of motion and part of 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 when something stops you a little momentum a lot of momentum the quantity of motion momentum what's the weather momentum that's why most football players are so big when they're moving Play My Quest I'll show you are bats blind Samsung momentum Dependable DMS correct equation it looks like this momentum equals mass times velocity so the amount of momentum an object has is a function of both its weight its mass and it's velocity why can an equation a lowercase p P peoples and me or MV equals b b b well I have a moment I have mass and I have a lhasa Tissot I must have momentum and we can figure out my momentum really easily we just have to multiply Mess by the last week there's something really sick about momentum Five Horses Davis the momentum just keep going and going and it's physics that's a lot no I don't have momentum I'm stop well what happened I'm outside porch affected my momentum in this case it was a friction of my wheels friction is a force that affects 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 outside force to affected the momentum can go on forever stationary player and they stick together like this they become one object that's called a collision the momentum stays the same but now they have a greater mass because what is saying like your momentum is less Sammy contact actually Napoleon it's your speed that's last year momentum State football finals in yards forget all that metric stuff to see if we use pounds 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 makes contact Defenders weigh 290 Pounds or approximately 130 kg video frame each frame is 1/30 of a second the defender is moving so 30ft second or 9 m do we have mass and velocity X and we get momentous 1170 kg meters per second that look what happens after they make contact because they stick together there now moving as a single Matt we have the Defenders man send the running backs Mass to get a new mask of 214 kilos is 471 lb 4 6 7 meters per second to wear new math Fair New velocity we get along 70 kg meters per second the same momentum we had before the momentum is conserved get the quarterback had no frictional force against the ground but I will say he did Debbie did the momentum would be reduced by the amount of friction but because there's no outside force the momentum stays the same football field that usually both players who are moving right let's say we had two players with the same mass and they hit each other with exactly the same velocity in opposing directions what would happen let's go to these Sports because Blackboard and take a look anytime of day Francis Wyman an offensive lineman go head-to-head you have a collision of Major League proportion Wayne in the neighborhood of 300 lb of each these players carry a lot of momentum so what happens when they meet they both get off the line velocity is the same when they meet the offensive lineman has momentum in this direction will call that positive and negative when two objects Collide we can see the sum of their momentum to figure out what's going to happen when they hit head-on we add there to momentum to get zero they stopped to Big players one big Collision you add them up you get one big 0 there are equal in a cancel each other out it's all in the numbers I Mark Malone at the sports figures Blackboard all that stuff works when you hit each other head-on but most of the time it's not that way cancel the ride but the momentum is still can serve so no point what happens when you're running and offender hit you at in a momentum is yours and the Defenders momentum and it gets hit at a 90 degree angle by defendant okay so what are we got here directions defensive back have momentum in this direction Monica why did they figure out momentum in different mentions we use arrows like this they're called Force vectors okay this Arrow here represents the song of our two lamented that's added together Napoleon and the defender had exactly the same momentum because they weigh more in the directions you can use vectors like this to figure out exactly what the relative momentum for different objects were before a collision that's what this gentleman does for a living this is Steve level and he's a traffic investigator for the Oakland Police Department so Steve how do you use physics preceded in the intersection and then struck his car on the side based on the weight of the car the weight of this vehicle the angles of approach and angles of departure using momentum I can actually calculate the driver speeds to find that he's not all truthful when saying he's stop down the pole and you weigh 285 lb okay so that would be 6X meters to feet 83 kilos * 3.66 meters per second is 303.8 meters per second that's a lot of momentum and because I weigh less I can get up to speed faster because my inertia is left oh well no boy you been studying physics Avenue the momentum is like a quantity of motion that we can find a number for momentum by multiplying the object's mass by his glasses momentum is conserved the law see you until acted upon by some outside force if you can find a sports figures bye-bye logging on to go Network go.com

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