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24 Cards in this Set

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