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Define momentum
product of an object's mass and its velocity
units for momentum
kg m/s
impulse definition
change in object's momentum
This states the impulse applied to an object is equal to its change in momentum
Impulse Momentum Theorem
Which has more momentum? A mouse running at 5 m/s or a Car at a stoplight?
The mouse!
Is momentum a vector or scalar quantity?
vector
Describe a scenario where two objects have the same momentum
????
What is the formula for Impulse?
mvf - mvi or change in p
From where is the formula for impulse derived?
Newton's second law
Come to the board to show the derivation of the formula for impulse
????
Why are airbags used in cars? Relate your answer to impulse
increase of time of impact will lower force of impact
Why do runners change their shoes every 300 miles? Relate you answer to impulse.
More cushion means increase of time of impact therefore lowering force of impact
Why do baseball players "swing through" when hitting the ball? Relate your answer to impulse
Increase of time means decrease of force of impact (injury prevention)
Why did the egg not break when thrown against the sheet versus the wall?
increase of time will decrease the force of impact
What is the velocity of a 5-kg object whose momentum is -15 kg m/s?
-3 m/s
