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21 Cards in this Set
- Front
- Back
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What is physics?
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the study of matter and energy and the interactions that occur between them.
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What is classical physics?
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Deals with subjects studied by physicists from the time of Galileo until about 1900: mechanics, thermodynamics, sound, light, and electricity and magnetism.
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What categories fall under the title "modern physics"?
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quantum mechanics, relatvity, solid state physics, and particle physics.
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What is the primary foundation of technology?
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Physics
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what is technology?
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applied science
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Who discovered the laws of motion and gravitation?
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Sir Isaac Newton
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What is mechanics?
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the branch of physics dealing with the study of objects in motion.
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What is speed?
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the distance traveled in a given time. The rate of the motion.
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Who wrote Principia?
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(Sir Isaac) Newton
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What is acceleration?
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A change in speed or direction (or both); a change in velocity
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What is the equation for determining acceleration?
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Acceleration = Final velocity - initial velocity / time
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According to philosophers before the time of Galileo and Newton, why did objects move?
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because they "wanted" to move or because it was their "nature" to move.
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How many laws of motion did Newton propose in his book 'Principia'?
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Three
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What is Newtons’ first law of motion?
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The velocity of an object does to change unless the object is acted upon by an external force.
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How can the second law of motion be stated mathematically?
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force = mass x acceleration (F = ma)
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What is the SI unit of force?
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Newton
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According to Newton’s third law of motion, when one object exerts a force on a second object, what kind of force does the second object exert on the first object?
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An equal and opposite reaction.
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Can a force exist by itself?
Why or Why not? |
No
All forces occur in pars (according to the third law of motion.) |
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What is the scientific formula for momentum? (symbolized 'P')
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Momentum = mass x velocity
p = mv |
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What is the Law of Conservation of Momentum?
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in any group of objects that act upon each other, the total momentum before the interaction equals the total momentum after the action.
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What is the scientific mathematical formula for gravitation?
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Force = G x (Mass of first object x mass of second object / distance 2 [squared])
F = G (m1 X m2 / d2 |
