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momentum and impulse momentum momentum (p): a measure of how difficult it is to stop an object depends on mass and velocity • p= (mass)(velocity) = mv • units: kg ● . momentum is a vector quantity direction of momentum will be exactly the same as the direction of motion • a moving object has a large momentum of it has a large mass, a high speed, or both • the momentum of any object at rest is 0 an object moving forward has positive momentum, then an object moving backwards has negative momentum. ex. determine the momentum of a 60kg halfback moving east at 9 m/s 。 p = 60(9) = 540kg east To stop an object with momentum, you must apply a force against its motion for a period of time. • F = ma → mAv • falling object: p = mgt F = m² → Ft = momentum and impulse impulse (J): change in momentum • J = AP= Pf - Po = vo) = Ft = m(vf - • you can lower the force it takes to stop an object by increasing the time the objects are in contact o ex. bubble wrap, football gear, running shoes, car crumple zone ex. how much impulse is necessary to increase the speed of a 1000kg car from 10m/s to 30m/s in 100 m? what is the average force? • J = 1000 (30 - 10) 20000kg o using S1 equations, t = 5s o...
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Alternative transcript:
F = Av: 20000 = = 4000N o or, using S1 equations, a = =4 。 F = ma = 1000 (4) = 4000N 1 conservation of momentum law of conservation of momentum: the total momentum in an isolated system remains constant types of collisions: • elastic collision: the objects bounce off each other • inelastic collision: the objects stick together Ep o Uf = explosion: the objects explode (aka. reverse collision) 1D collisions equation: Σpf = Spo PloP20 P1f + P2f m1v10 + m₂v20 = m₁v₁ƒ + m2 V2f 2D collisions equations: Σpox = Σpfæ Plox P2ox Plfx + P2fx m1vlox + m2V20x = m1v1fx + M2V2fx momentum and impulse Spoy = Spfu Ploy P2oy Pify + P2fy m1vloy + m2V2oy = m₁v₁fy + m2v2fy 2
momentum, impulse, conservation of momentum
kylie
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momentum, impulse, conservation of momentum
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momentum and impulse momentum momentum (p): a measure of how difficult it is to stop an object depends on mass and velocity • p= (mass)(velocity) = mv • units: kg ● . momentum is a vector quantity direction of momentum will be exactly the same as the direction of motion • a moving object has a large momentum of it has a large mass, a high speed, or both • the momentum of any object at rest is 0 an object moving forward has positive momentum, then an object moving backwards has negative momentum. ex. determine the momentum of a 60kg halfback moving east at 9 m/s 。 p = 60(9) = 540kg east To stop an object with momentum, you must apply a force against its motion for a period of time. • F = ma → mAv • falling object: p = mgt F = m² → Ft = momentum and impulse impulse (J): change in momentum • J = AP= Pf - Po = vo) = Ft = m(vf - • you can lower the force it takes to stop an object by increasing the time the objects are in contact o ex. bubble wrap, football gear, running shoes, car crumple zone ex. how much impulse is necessary to increase the speed of a 1000kg car from 10m/s to 30m/s in 100 m? what is the average force? • J = 1000 (30 - 10) 20000kg o using S1 equations, t = 5s o...
momentum and impulse momentum momentum (p): a measure of how difficult it is to stop an object depends on mass and velocity • p= (mass)(velocity) = mv • units: kg ● . momentum is a vector quantity direction of momentum will be exactly the same as the direction of motion • a moving object has a large momentum of it has a large mass, a high speed, or both • the momentum of any object at rest is 0 an object moving forward has positive momentum, then an object moving backwards has negative momentum. ex. determine the momentum of a 60kg halfback moving east at 9 m/s 。 p = 60(9) = 540kg east To stop an object with momentum, you must apply a force against its motion for a period of time. • F = ma → mAv • falling object: p = mgt F = m² → Ft = momentum and impulse impulse (J): change in momentum • J = AP= Pf - Po = vo) = Ft = m(vf - • you can lower the force it takes to stop an object by increasing the time the objects are in contact o ex. bubble wrap, football gear, running shoes, car crumple zone ex. how much impulse is necessary to increase the speed of a 1000kg car from 10m/s to 30m/s in 100 m? what is the average force? • J = 1000 (30 - 10) 20000kg o using S1 equations, t = 5s o...
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Knowunity was a featured story by Apple and has consistently topped the app store charts within the education category in Germany, Italy, Poland, Switzerland and United Kingdom. Join Knowunity today and help millions of students around the world.
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iOS User
I love this app so much [...] I recommend Knowunity to everyone!!! I went from a C to an A with it :D
Stefan S, iOS User
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SuSSan, iOS User
Love this App ❤️, I use it basically all the time whenever I'm studying
Alternative transcript:
F = Av: 20000 = = 4000N o or, using S1 equations, a = =4 。 F = ma = 1000 (4) = 4000N 1 conservation of momentum law of conservation of momentum: the total momentum in an isolated system remains constant types of collisions: • elastic collision: the objects bounce off each other • inelastic collision: the objects stick together Ep o Uf = explosion: the objects explode (aka. reverse collision) 1D collisions equation: Σpf = Spo PloP20 P1f + P2f m1v10 + m₂v20 = m₁v₁ƒ + m2 V2f 2D collisions equations: Σpox = Σpfæ Plox P2ox Plfx + P2fx m1vlox + m2V20x = m1v1fx + M2V2fx momentum and impulse Spoy = Spfu Ploy P2oy Pify + P2fy m1vloy + m2V2oy = m₁v₁fy + m2v2fy 2