Momentum
A feather falling at 10m/s What is Momentum? Which would you rather try to stop: A feather falling at 10m/s Or A car falling at 10m/s Although both fall at the same speed, why is one harder to stop?
What is Momentum? Momentum = __________ = an object’s ability to ____________ a change in motion Remember, inertia depends on __________________________________ inertia resist Mass and Velocity *Must be in Motion
What is Momentum? Which object has more mass: the feather or the car? Which object has more momentum: the feather or the car? Which object resists a change in motion more:
What happens to momentum when objects collide? Situation 1: Push both cars in the same direction. However, make car A move faster than car B, so it runs into the back of car B. What happens to the momentum of each car? A B
What happens to momentum when objects collide? Situation 2: Let car B sit still. Push car A so that it runs head on into car B. What happens to the momentum of each car? A B
What happens to momentum when objects collide? Situation 3: Make sure the magnetic sides of both cars are facing each other. Let car B sit still. Push car A so that it runs head on into car B and sticks to it. What happens to the momentum of each car? A B
What happens to momentum when objects collide? Although momentum transfers between objects, none is lost. Law of __________________ of momentum = the total momentum of any group of objects remains the __________ unless outside forces act on the objects Total momentum does not change Momentum before ___________ momentum after conservation same equals
Types of collisions Two moving objects Their momentums switch Their speeds switch also
Types of collisions One moving object Their momentums switch Their speeds switch also
Types of collisions Objects that stick together Their momentums are evenly distributed Their speeds are evenly distributed as well