Conservation
What does it mean to conserve something?
we keep the same amount of it
A shelf is pushed with a force of 50 N for 3 seconds. What is the impulse on the shelf?
150 kg m/s
Two students run into each other in the hallway and bounce apart. What kind of collision is this?
Elastic
When was Martin Luther King Jr's "I Have a Dream" speech made?
August 28th, 1963
A desk is sliding across a classroom and is stopped by friction. Was momentum conserved?
No, there was a net force in the form of friction
What is the change in momentum on a desk that is pushed with a force of 20 N for 3 seconds?
60 kg m/s
A 2 kg baseball is traveling at 60 m/s. What is its momentum?
120 kg m/s
Two ice skaters are skating together and then push off from each other. What kind of collision is this?
Elastic Collision
What is the 15th Amendment?
The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any State on account of race, color, or previous condition of servitude.
If momentum is conserved in a situation (like a collision), what is the total change in momentum?
Delta p = 0 kg m/s
A boat with a momentum of 300 kg m/s has a mass of 1500 kg. How fast is the boat going?
0.2 m/s
If the total momentum before a collision is 150 kg m/s, what do you know about the total momentum after the collision?
It is also 150 kg m/s
What county is Mr Novack from?
Roane County
Is momentum ALWAYS conserved?
No, not when there is a NET FORCE
Woof the dog is running at 12 m/s and has a momentum of 600 kg m/s. What is Roofer's mass?
50 kg
A 400 kg paddle boat collides head-on with a 200 kg raft that started at rest. If the boats stick together and continue on with a velocity of 5 m/s, how fast was the 400 kg paddle boat going before the collision?
7.5 m/s
How do you make an elephant float?
Two scoops of elephant one scoop of vanilla
A piece of clay at rest is exploded into THREE pieces. The first piece of clay has a momentum of -10 kg m/s. The second piece has a momentum of 2 kg m/s. What is the momentum of the third piece?
8 kg m/s
A 5 kg box starting at rest is pushed with a force of 10 N. Friction pushes the box back with a force of 8 N. How fast is the box going after 10 seconds?
4 m/s
Monica (50 kg) and Oscar (60 kg) are jogging. Monica has a momentum of 100 kg m/s. What is Oscar's momentum?
120 kg m/s
Juan and Carla are ice skating toward each other. Juan has a mass of 70 kg and is skating at 2 m/s. How fast must 60 kg Katherine be going so that when they meet in the center of the rink, they will stop?
-2.3 m/s
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