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# Physics

### Chapter 8-9

What is the study of motion called? Kinematics
What is a scalar? A scalar describes the 'size' of a measurement. (not the direction)
What is the term used to describe the magnitude/size and direction? Vector
-Bob runs 8m/s- This is an example of a scalar or a vector? Scalar
-Zoe runs 300m east- This is an example of a scalar or a vector? Vector
What is the term to describe the length between 2 points is? Distance (scalar)
What is the term to describe a specific point with respect to a reference point? Position (vector)
What is displacement? This is how far the final position is from the initial position. (vector) ex) Rob ran a 200m relay around the track. - Distance = 200m - Displacement = 0m
-Fill in the blank- When calculating direction we use negative and positive numbers. Right, up forward, north, and east are all examples the number would be _________. Positive
-Fill in the blank- When calculating direction we use negative and positive numbers. Left, down backward, south, and west are all signs the number would be __________. Negative
Time is how long it takes an event to occur. What is this measured in? Seconds (scalar)
What is uniform motion? When an object moves at a constant speed in a straight line.
What is the term to describe the distance traveled divided by the time taken to travel? Speed ex) 80 km/h or 11m/s
What is the term to describe the displacement traveled divided by the time taken? Velocity
What is the term to describe the point when 2 lines that cross over? Intercept
How do you calculate slope? M= Rise/Run -> on a position time graph this is used to find velocity
How do you convert 97.3km/h to m/s? 97.3 km/h / 3.6 = 27.02 m/s
How do you convert 43.8 m/s to km/h? 43.8m/s x 3.6 = 157.68 km/h
What is the term to describe the rate at which velocity changes? Acceleration (vector) -WOOT WOOT, Chapter 9!-
Acceleration depends on 2 variables what are they? 1. Time it takes to speed up or slowdown 2. How much the velocity changes
Is it possible to have a negative acceleration? Yes.
2 ways of calculating Acceleration, one is given to you on your cheat sheet, what is the other way? The slope of a v/t graph
-Fill in the blank- ________ is whenever gravity is the only force on a object. Freefall
In freefall ALL objects accelerate at what rate? -9.80m/s 2 or 9.80m/s (down) - Gravity is always downward this means is always negative
Created by: nessacarloni10