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13 Cards in this Set
- Front
- Back
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In Uniform Circular Motion, are speed and velocity constant? |
Speed is constant, velocity is not, because of changing directions |
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What is Centripetal Force |
Net force that works towards the centre of the circle |
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What is Period (T) |
The time required for an object to make one complete rotation or cycle T=s or T=s/cycle |
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What is Frequency (f) |
The number of cycles an object makes in an amount of time Cycles/time, cycles/s=Hertz(Hz) |
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What is the relationship between period and frequency? |
T=1/f or f=1/T |
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Given radius and period/frequency, what is the formula for velocity? |
V=2πR/T |
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Given velocity and radius, what is the formula for centripetal acceleration? |
a=v^2/R |
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Given mass, velocity and radius, what is the formula for centripetal force? |
F=mv^2/R |
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Why is horizontal and vertical circular motion different? |
In vertical horizontal motion, you have to consider the force of gravity, depending on the position of the object. |
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What is the difference between true weight and apparent weight? |
True weight is the gravitational pull on your mass, and does not change. F(g) Apparent weight is the force felt when undergoing changes in acceleration, and does change. W=-F(N) or W=-F(T) |
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What is Kepler's 1st law |
All planets rotate in elliptical orbits with the Sun at one focus point |
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What is Kepler's 2nd law |
Assuming a string is tied between the planet and Sun, Equal areas of space are carved out by the string over equal periods of time,as the planet follows its orbit around the sun. |
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What is Kepler's 3rd law? |
The ratio of a planets orbital period squared and it's orbital radius average is constant Planet a planet b T^2/R^3=T^2/R^3 |
