momentum Flashcards
(18 cards)
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Momentum
the amount of motion something has , this is also called dynamic inertia or inertia of motion. It is a vector quanity
what does momentum represent?
P
what is momentum measured through?
kg m/s
impulse
change in momentum, the amount of force acting on the object over time. is a vector quantity
what is impulse measured through?
kg m/s 2 x s = k/g m/s
what is the formula for momentum
momentum = mv
formula for impulse
impulse = FT
FT is also =?
Ft = triangle MV
elastic collision
when two objects collide against each other and both momentum and kinetic energy are conserved. (quantities) there is no net loss in Kinetic energy which means no damage has been done to either object.
inelastic collision
when two objects collide against each other and momentum is conserved but kinetic energy is not. (quantities) the Kinetic energy has been transferred somewhere else which leads to a net loss of it to either one object. which means damage has been done.
2 in - 2 out
m1v1 +m2v2 = m1v2+m2v4
2 in - 1 out
m1v1 + m2v2 = (m1+m2) VF
1 in - 2 out
VF (m1+m2) = m1v1+m2v2
FT
the formula for impulse, force multiplied by time (J=FT)
Bouncing
when the ball hits the ground there is an equal and opposite force on the ball. it bounces back upward due to the collision on the ground, which makes it bounce.
elastic energy to kinetic makes it rise against the ground. (action reaction/ elastic collision)
what happens when impulse changes when it comes to bouncing
When moment of impulse is greater than the initial, then the object would continue to bounce
If the moment of impulse is smaller, the object would not bounce anymore or the bounce would be smaller
pelton
connected to bouncing, Travels in a integrated unit, the word means ball but most preferably group, you can think of it as when comparing 2 group of cyclist, the group with a better well balanced and organized motion, would be more efficient and maintain a faster pace over time (the impulse over time/momentum is greater)
