Download Conservation of Momentum Guided Notes

Conservation of Momentum Guided Notes
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Conservation of Momentum
● In any closed system (no external force) total momentum is conserved.
● When we have more than one object,
OR
Example: Explosion / Ejection
A 60.0-kg astronaut is on a space walk when her tether line breaks. She throws her 10.0-kg oxygen tank away from the shuttle with a speed of 12.0 m/s to propel
herself back to the shuttle. What is her velocity?
We Do Collision Problem
There are two fish in the sea. A 6 kg fish and a 2 kg fish. The big fish swallows the small one. What is its
velocity immediately after lunch?
a. the big fish swims at 1 m/s toward and swallows the small fish that is at rest.
b. Suppose the small fish is not at rest but is swimming toward the large fish at 2 m/s.
c. Small fish swims toward the large fish at 3 m/s.
d. Small fish swims toward the large fish at 4 m/s.
What if the objects travel at angles to each other???
 Resolve vectors into components
 Apply conservation of momentum to the x direction and the y direction.
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AND -
Example 1
A red ball traveling with a speed of 2 m/s along the x-axis hits the eight ball. After the collision, the red ball
travels with a speed of 1.6 m/s in a direction 37o below the positive x-axis. The two balls have equal mass. At
what angle will the eight ball fall in the side pocket? What is the speed of the blue (8 th) ball after collision.
Example 2
Example 3
Example 4