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Definitions |
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Suppose you jump from a high perch does flexing your legs increase the stopping time and reduse the stopping force?
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True
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The concept of change in momentum is?
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impulse
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What happens in Inelastic
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They stick together
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The net force acting on a body is equalto the rate at which the body's quantity of motion is changing
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original version
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What is the SI unit of momentum?
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kilogram-meter per second (kg*m/s)
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Two objects collide and bounce off each other
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Elastic Collisions
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In the absence of external forces the momentum of a system remains constant
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Conservation of momentum
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The net force acting on a body is equal to the product of the body's mass and its acceleration
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the perverted version
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What is the representation of impulse?
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letter J
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it is the product of an object's mass and velocity
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Momentum
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Impulse cannot be described mathematically in many ways
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false
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Impulse is not the rate of change in momentum but the total chage in momentum. true or false?
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true
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What happens in Elastic
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They bounce off each other
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since momentum is a vector .. is impulse a vector too?
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true
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Can a momentum of an object change significantly by a large force if the force acts over the a long period of time?
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false
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A collision in which a body stick together on colliding and proceed thereafter with a common velocity is side to be perfect inelastic
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Perfect Inelastic Collision
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Impulse can be described mathematically in many ways
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true
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Any collisions in which the total kinetic energy is not conserved is called an _______
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Inelastic collisions
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M1V1 + M2V2 = M1V1' + M2V2
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momentum BEFORE = momentum AFTER
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EF=ma
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the perverted version
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Newton's "quantity of motion" is what we now call?
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Momentum
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it is equivalent to the newton-second law(N*s)
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kilogram-meter per second (kg*m/s)
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Suppose you jump from a high perch does flexing your legs decrease the stopping time and reduse the stopping force?
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false
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momentum is a vector .. impulse is not True or false?
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false
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Can a momentum of an object change significantly by a small force if the force acts over the a long period of time?
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true
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Is the original version of the law different from the perverted one?why?
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no new rules we simply have a new way of stating newton's second law
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Can a momentum of an object change significantly by a large force if the force acts over the a short period of time?
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true
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Two objects collide and stick together
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Inelastic Collisions
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When is this use "M1V1 + M2V2 = M1V1' + M2V2'"
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Elastic and Inelastic Collisions
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One object separates into two fragments
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Explosions
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What are the 3 types of collisions?
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Elastic Collision Inelastic Collision and Perfect Inelastic Collision
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Change in momentum of an object that is caused by a force acting on a object for some period of time
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impulse
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An _____ collision is one in which the total KE as well as the total momentum of the system is conserved
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Elastic Collision
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EF=^p/^t
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original version
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momentum BEFORE = momentum AFTER
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Conservation of momentum
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Can a quick change in momentum and a slow change in momentum can involve the same impulse?
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True
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Can a momentum of an object change significantly by a small force if the force acts over the a short period of time?
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false
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