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24 Cards in this Set
- Front
- Back
Define momentum
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Mass times its velocity
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Formula for momentum
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MV
Mass x velocity Mass x speed (if direction is not given) |
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When comparing two objects of different masses going the same speed which will have more momentum?
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The one with greater mass
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What are the circumstances if the momentum of an object and changes mass and remains the same?
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It's accelerating or decelerating
There is a force acting on it The velocity is changing |
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What is the momentum change of an object equal to?
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The impulse acting on it
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Describe an elastic collision
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There is no lasting deformation
The objects don't stick together The object that collide do not get warm |
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define inelastic ocllision
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when 2 objects collide and stick together collison kinetic energy
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is momentum conservedonly when interacting objects move along a straight line?
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no it is conserved regardless of the path of the colliding objects
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when is the momentum of a system conserved?
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when there is no net external force acting on the system
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how could you increase the final momentum of a goll ball?
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increase the force acting on it
follow through ewhen hitting the ball swing as hard as possible |
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which has the largest momentum?
a parked car a building a do running a car driving down the highway |
a car driving down the highway
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suppose you are styanding on a frozen pond where there is no friction bewtween your feet and the ice what's the best way to go off the ice?
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throw something in the direction opposite to the way you want to go
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when mass on an object is doubled what impact does that have on momentum
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it is doubled
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when catching a ball why does a baseball player moves their hand backward in the direction of the ball's motion?
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because the time of impact is increased
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under what circumstance may more stopping force be required to tstip a moving vehicle?
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with less stopping distance
if more mass is added to the whicle if momentum is increased |
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two objects of the same mass and speed colliede and stick together. What is their velocity after the collision?
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zero
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a cannonball shot from a long-barrel cannon travels faster than one shot from a short-barrel cannon.
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the cannonball recives a greater impulse
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what happens to the momentum of a car when it doubles it's speed
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the momentum doubles
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formula for speed when given mass and moementum
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momentum/mass
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how do you determine the mass of an object whn given it's speed and momentum?
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momentum/speed
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describe what happens to ta falling object that bounces in term of momentum and impulse
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they are greater than for stopping
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which of newton's laws is the impulse-momentum relationship a direct result of ?
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Newton's 2nd law
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define impulse
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the force exerted on an object x the time it lasts
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is momentum scalar quantity?
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no because it has magnitude and direction
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