Physics Intro & Kinematics

1 Physics Intro & Kinematics Quantities Units Vectors Displacement Velocity Acceleration Kinematics Graphing Motion in 1-DSome Physics QuantitiesVector - quantity with both magnitude (size) and directionScalar - quantity with magnitude onlyVectors: Displacement Velocity Acceleration Momentum ForceScalars: Distance Speed Time Mass EnergyMass vs. WeightOn the moon, your mass would be the same, but the magnitude of your weight would be Scalar (no direction) Measures the amount of matter in an objectWeight Vector (points toward center of Earth) Force of gravity on an objectVectors The length of the arrow represents the magnitude (how far, how fast, how strong, etc, depending on the type of vector). The arrow points in the directions of the force, motion, displacement, etc.

0 t+ at2 2 1 (cont.) Kinematics Derivations (cont.) 2 1 v f = v 0 + at t = (v f – v 0)/a ... You should work out the algebra to prove the final result on the last line. Sample Problems 1. You’re riding a unicorn at 25 m/s and come to a uniform stop at a red light 20 m away. Wh at’s y ou rc el i n? 2. A brick is dropped from 100 m up. Find its

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