Physics Final 1

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mormons14
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194710
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Physics Final 1
Updated:
2013-01-23 14:01:37
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Physics Final
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Physics Final 1
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  1. In an experiment, if the difference in value is large, what is the likely cause of that?
    Human error
  2. In an experiment, if the difference in value is small, what is the likely cause of that?
    Friction, gravity, air resistence
  3. What is a conclusion?
    The end or close;final part. Usually containing a summing up of the points and a statement of opinion or decisions reached. 
  4. What is a hypothesis?
    A proposition, or set of propositions, set forth as an explanation for the occurrence of some specified group of phenomena, either asserted merely as a provisional conjecture to guide investigation or accepted as highly probable in the light of established facts. 
  5. What is the difference between a conclusion and a hypothesis?
    A conclusion is what you discover after research and experiments while a hypothesis is an educated guess that could be wrong. 
  6. What is the formula for average speed?
    • dtot=Average Speed
    • ttot
  7. What is the third law of motion?
    If two objects interact, the magnitude of the force exerted on object 1 by object 2 is equal to the magnitude of the force simultaneously exerted on object 2 by object 1, and these two forces are opposite in direction. Basically, when two bodies exert force on each other, the forces are equal in magnitude and opposite in direction. These forces are called an action-reaction pair. Forces always exist in such pairs. 
  8. What does the second law of motion state?
    The net force acting on an object is equal to the product of the object's mass and the object' acceleration.
  9. What is the formula for the second law of motion?
    • Fnet=ma
    • Fright-Fleft=ma
    • Fapplied-Ffriction=ma
  10. What is the formula for Kinetic energy?
    1/2mv2=KE
  11. In the formula KE=1/2mv2, what is never negative?
    KE
  12. What is the formula for potential energy?
    • PE=mgh
    •       are
    •       sai
    •       svg
    •         ih
    •         tt
    •         y
  13. PE=mgh, what SI unit is mass and height in?
    • Mass=kg
    • Height=m
  14. What is the conservation of matter?
    A fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system. It can only be transformed. KE=PE only if no friction or air resistance.
  15. What is the formula of momentum?
    • p=mv
    • (with an arrow to the right on p)
  16. When in momentum conserved?
    In elastic and inelastic collisions. 
  17. What is conserved in elastic collisions?
    KE
  18. What is the concept of momentum?
    It is the product of mass and velocity of an object. The heavier the object the more momentum the object has.

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