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versions of Physics Formulas:
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Updated
2009-02-26 17:05
Summary
Miscellaneous basic physics formulas and terms.
Formulas
| Result | Formula |
|---|
| scalar | a single number |
| vector | has a magnitude and a direction |
| speed | distance traveled / time (a positive scalar) |
| velocity | displacement / time (a vector) |
| acceleration | velocity / time (a vector) |
| acceleration | can occur when the velocity changes direction
while the speed stays fixed |
| centripetal acceleration | v2/r, the acceleration toward the center of a circle needed to maintain circular motion with radius r and speed v |
| Energy | mc2 |
| frequency | number of waves which pass a given point per second |
| specific gravity | SG = density (substance) / density (water) |
| P(abs) | P(gauge) + P(atm) |
| memorize |
More Formulas
| Result | Formula |
|---|
| Young's Modulus (for tensile stress) | (F/A) / (dh/ho) |
| Shear Modulus | (F/A) / (dx/ho) |
| Bulk Modulus | (dP) / (dV/Vo) |
| Avogadro's Number | 6.02 x 1023 |
| acceleration (average) | change in the velocity / change in time |
| distance object falls from rest | d = (1/2)gt2 |
| how fast object falls from rest | v = gt |
| memorize |
Terms
| Term | Description |
|---|
| angle of incidence | angle light strikes a surface |
| angle of reflection | angle light reflects from a surface |
| concave mirror | produces inverted image |
| convex mirror | produces smaller upright image |
| convex lens | thicker in center (produces inverted image) |
| memorize |
More Terms
| Term | Description |
|---|
| concave lens | thinner in center |
| primary colors of light | red, green, blue |
| amplitude | distance between resting point and crest or trough |
| wavelength | distance between identical points in wave |
| acceleration is measured in | m / s2 |
| memorize |
Miscellaneous
| Equation | Meaning |
|---|
keq=[(1/k1)+(1/k2)]-1
=(k1 k2)/(k1 + k2) | equivalent spring constant for 2 springs in series |
| keq=k1+k2 | equivalent spring constant for 2 springs in parallel |
| memorize |
Reference: http://en.wikipedia.org/wiki/Hooke's_law.
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