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14 Cards in this Set

  • Front
  • Back
Conservation laws
The total mass in an isolated system is constant.
Linear momentum
The mass of an object times its velocity. Linear momentum is a vector.
linear momentum = mv
Energy
measure of a system's capacity to do work. (E)
angular momentum
spinning
Law of conservation of linear momentum
The total iinear momentum of an isolated system is constant.
total mv before = total mv after
Work
Force x distance
10 lbs x 10' = 100 ft-lbs
kinetic energy
1/2 mv2
energy due to motion. Energy that an object has because it is moving.
potential energy
Energy due to an oject's position or orientation.
mgh
Law of conservation of energy
Energy cannot be created or destroyed, only converted from one form to another.
Power
rate of doeing work. rate at which energy is transferred or transformed.
work divided by time
What is a conservation law? What is the basic approach taken when using a conservation law?
no matter enters or leaves the system.
Why is the alternate form of Newton's second law of motion given in this chapter the more general form?
because of a small force for a long time or a big force for a short time.
For what type of interaction between bodies is the law of conservation of linear momentum most useful?
momentum of an object can change only because of interaction with other objects in the system.
Identify as many diferent forms of energy as you can that are around you at this moment.
lights heat graitational stored