### SEMESTER REVIEW

Emilie Cross

Terms to know for 1st semester physics

 Centripetal A type of collision where momentum is conserved, but KE is not. Elastic The slope of a position-time graph, can be or - Velocity The rate of change of velocity with time Potential The product of force and distance when they act in the same direction Energy A push or pull on an object due to the interaction of two objects. Work A term used with "energy" or "friction" that implies motion Speed A term often used with "acceleration" that literally means "center-seeking" Newtons A force that exists between any two masses separated by a distance Acceleration A change in momentum Gravity A quantity with magnitude Inertia How fast an object is traveling Impulse The tendency for an object to resist changes in velocity; directly related to its mass. Power The type of force that is directed perpendicular to a surface Force The change in position of an object (from start to finish) Displacement The rate at which work is done; the rate at which energy is used. Kinetic A force that opposes motion when two surfaces slide past each other Normal Inertia in motion Period The size of a given quantity - how much? how fast? how far? etc. Inelastic A term used with "energy" that implies stored energy. Static The units for mass when using an equation Vector The number of circles or cycles per unit of time Friction A term used with "friction" that implies a lack of motion Momentum The amount of time for a complete circle or cycle Frequency A type of collision where both KE and momentum are conserved Kilograms The units used to measure force Magnitude The ability to do work

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