click below

click below

Normal Size Small Size show me how

# Physics Unit 1 Vocab

Term | Definition |
---|---|

Equation | a statement that the values of two math expressions are equal (indicated by the sign =). |

Law | A rule describing a relationship that always works in the same way under the same conditions. |

Frequency | the number of occurrences of a repeating event per unit of time. |

Oscillation | movement back and forth at a regular speed |

Wave Period | the time it takes to complete one cycle. |

Amplitude | the distance from the resting position to the top of a crest or to the bottom of a trough. |

Geo centrism | the belief that the Earth is at the center of the Universe. |

Gravity | is a force that attracts a body towards the center of the earth or any other physical body having mass. |

Heliocentrism | the belief that the Sun is at the center of the Universe |

Acceleration | the rate at which velocity changes over time. |

Centripetal force | Any force that keeps an object moving in a circle. |

Velocity | a speed in a specific direction. |

Terminal velocity | the final, maximum velocity of the following object. |

Force | a push or pull’ something that changes the motion of an object. |

Friction | A force that resists the motion between two surfaces in contact. |

Energy | The ability to do work or to cause a change. |

Theory | a well-tested explanation of a phenomenon that is consistent with all available evidence. |

Inertia | the resistance of an object to a change in speed or direction of its motion. |

Joule | a unit used to measure energy and work. |

Kinetic energy | the energy of motion. |

Law of conservation of energy | energy is neither created nor destroyed but transformed and transferred from one form to another. |

Law of conservation of momentum | the amount of momentum does not change in a system as long as there is no outside force acting on that system. |

Momentum | a measure of mass in motion. |

Motion | a change of position over time. |

Vector | a quantity that has both size and direction. |

Work | the amount of energy to move an object in the direction of the force applied. |

Simple Machine | a mechanical device that changes the direction or magnitude of a force. |

Newton's First Law of Motion | a law stating that an object at rest remains at rest and an object in motion remains in motion with the same velocity and in a straight line unless acted on by an unbalanced force. |

Newton's Second Law of Motion | a law stating that the acceleration of an object increases with increased force, and decreases with increasing mass. |

Newton's Third Law of Motion | a law stating that every time one object exerts a force on another object, the second object exerts a force that is equal in size and opposite in direction back on the first object. |

Equation for Frequency of a Wave | f=vλ |

Equation for Speed | s=d/t |

Equation for Acceleration | a = Δv/Δt |

Equation for Force | F=m x a |

Equation for Momentum | P=mv |

Equation for Work | W=Fs |

Equation for Kinetic Energy | K.E.=1/2 m v x v |

Equation for Gravitational Potential Energy | U=mgh |

Equation for Second Law of Motion | F= m x a |

Equation for Newton's Universal Law of Gravitation | F=G m1 m2/r2 |