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### 23 Cards in this Set

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 The rate at which speed changes is called ACCELERATION Another word for rate of change is RATE What are the two rates of motion? SPEED and ACCELERATION What is the following an example of? "Your speed goes from 20 mi/h to 60 mi/h." CHANGE in SPEED or VELOCITY ("Delta" V) The triangle symbol (delta) means CHANGE IN The symbol for acceleration is a The symbol for change in velocity "delta" v The equation for acceleration is CHANGE IN VELOCITY / TIME The equation for change in velocity is FINAL VELOCITY - INITIAL VELOCITY The units for change in velocity are m/s The units for acceleration are m/s/s or m/s^2 What is the following an example of? "Your speed goes from 20 mi/h to 60 mi/h in 5 seconds." ACCELERATION The amount of speed increase or decrease compared to how long the speed takes to change is ACCELERATION The slope on a speed vs. time graph is equal to ACCELERATION The y-axis on an acceleration graph is SPEED or VELOCITY The x-axis on an acceleration graph is TIME Another word for negative acceleration is DECELERATION Positive acceleration means... SPEEDING UP Negative acceleration means... SLOWING DOWN No acceleration means... CONSTANT SPEED The acceleration of somthing dropped straight down is called FREEFALL Other than changing speed, what else can cause acceleration? CHANGING DIRECTION The steeper the hill, the faster you accelerate due to the effect of GRAVITY