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# PBHS physics

### Physics terms

Question | Answer |
---|---|

change in speed or direction | acceleration |

value that includes magnitude and direction | vector |

value that only includes amount (not direction) | scalar |

objects continue at rest or in motion at same speed and direction is which law? | Newton's 1st Law of Motion |

Newton's 1st Law of Motion called? | (law of)inertia |

Unbalanced force produces acceleration; force = mass x accel is which law? | Newton's 2nd Law of Motion |

Action-Reaction law | Newton's 3rd Law of Motion |

Friction between surfaces non-moving | static friction |

Friction between moving surfaces | kinetic friction |

suppport force perpendicular to a surface | normal force |

force through a distance (Fxd= ) | work |

total length | distance |

ending position minus starting position | displacement |

acceleration rate of freefall on earth | 9.8 m/s2 |

force toward the center of a curved path | centripetal force |

sum of all kinetic and potential energies | mechanical energy |

energy of motion | kinetic energy |

stored energy | potential energy |

rate of work (W/t) | power |

the time over which a force acts or the change in momentum (F x t) | impulse |

mass times velocity | momentum |

distance per time (d/t)with direction | velocity |

d/t without direction | speed |

rate of change in velocity | acceleratio |

attractive force between all masses | gravitational force |

directly proportional to product of masses and inversely proportional to square of distance between them | gravitional force |

capital/large 'G' | universal gravitational constant |

value of universal gravitational constant or universal constant or constant of proportionality | 6.67 x 10e-11 N-m2/kg2 |

universal law of gravitation stated by? | Sir Isaac Newton |

any push or pull | force |

amount of matter in composition | mass |

pull of gravity on mass | weight |

amount of space occupied | volume |

SI unit of mass | kg |

SI unit of length | m |

SI unit of temp. | K (the kelvin) |

SI unit of amount of substance | mole |

SI stands for | International System of Units |

SI unit of current | ampere (amps) |

SI unit of charge | coulomb |

SI unit of luminous intensity | candela |

SI unit of time | s |

SI derived unit of force | N |

SI derived unit of energy or work | J |

SI derived unit of volume | m3 |

SI derived unit of power | watt, W |

SI derived unit of pressure | Pa (pascal) |

SI derived unit of electrical potential or electrical differenctial (electrical force) | volt (V) |

Si derived unit of electrical resistance | Ohm |

SI derived unit of frequency (wave) | Hertz |

measurement of crest to crest on a wave | wavelength, Lambda |

frequency of one wave per second | one Hz |

from center of a wave to top of crest or bottom of trough | amplitude |

the greater the energy, the ____ the wavelength | shorter |

force per area (F/a) | pressure |

force of surfaces in contact | friction |

number of waves passing a point in a given amount of time | frequency |

distance a wave travels per time | wave speed or velocity |

an object in a fluid experiences an upward force equal to the weight of the fluid displaced | Archimedes' Principle |

upward force of a fluid | buoyant force |

mass per volume (m/v) | density |

the faster a fluid, the lower its internal pressure | Bernoulli's Principle |

Average KE of a substance's particles measures | temperature |

total energy of all of a substance's particles | thermal energy |

the transfer of energy from hotter to colder | heat |

-273.15 degrees Celsius | Absolute Zero |

0 kelvins | Absolute Zero |

Created by:
gkarlish