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Phys Periodic Motion
Physics terms associated with periodic (SHM, UCM, gravity) motion.
| Question | Answer |
|---|---|
| motion that occurs along a specific path at regular intervals | periodic motion |
| time interval required for a repeating event to occur | period (T) |
| the number of repeating events that occur in a certain time ("rate of occurrence") | frequency |
| unit for measuring frequency | hertz (Hz) |
| 1 Hz = _?_ waves/second | 1 |
| math relationship (proportionality) between frequency and period | inversely proportional |
| vibration-like motion along a repeating path around a central (equilibrium) point and caused by a 'restoring' force | simple harmonic motion (SHM) |
| force that points toward the equilibrium position and is proportional to the displacement of the object (amplitude) from that position | restoring force |
| displacement of an object undergoing SHM from its equilibrium position | amplitude |
| point along the path of an object undergoing SHM at which the net force is zero (0) | equilibrium position |
| gradual increase in amplitude of SHM by applying a small force at regular intervals | mechanical resonance |
| kicking feet on a swing, jumping on a trampoline, rubbing finger on stemware rim | examples of mechanical resonance |
| the elongation of a spring is proportional to the tension applied to it (within its elastic limit) | Hooke's Law |
| slope of the graph of tension force (N) applied to a spring vs. elongation (m) | spring constant |
| opposing forces for an object suspended from a spring | tension and weight |
| "the period of a pendulum is independent of swing amplitude" (my pulse told me this) | Galileo |
| quantity with both magnitude and direction | vector |
| speed in a particular direction | velocity |
| rate of change of velocity | acceleration |
| rate of change of speed in a constant direction | linear acceleration |
| rate of change of direction for a constant speed | centripetal acceleration |
| means "center-seeking" | centripetal |
| force that causes an object to change direction but not speed by acting perpendicular to the direction of motion (at all times) | centripetal force |
| distance around the perimeter of a circle | circumference (C) |
| a vertical loop with a changing radius ("teardrop") | clothoid loop |
| "gravity is directly proportional to the mass of attracting objects and inversely proportional to the square of the distance between their centers"... it's universally true! | Newton |
| "I found the universal gravitation constant, G!" | Cavendish |
| SI unit of force (and weight) | newton (N) |
| SI unit of (linear and centripetal) acceleration | m/s2 |
| SI unit of mass | kilogram (kg) |
| slowing down downward or speeding up upward | positive acceleration |
| slowing down upward or speeding up downward | negative acceleration |
| SI unit of coefficient of friction | (no unit) |
Created by:
goakley
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