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# Ch. 2 1 notes

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### Ch. 2 1 notes

1. 1. Ch. 2-2Acceleration
2. 2. Acceleration• Measures the rate of change of velocity in a given time• Calculated by dividing the total change in an object’s velocity by the time interval in which the change occurs
3. 3. Acceleration (cont.)• Dimensions are length divided by time squared (how much the velocity changes each second)• Vector (magnitude and direction)• Can be positive or negative
4. 4. Acceleration (cont.)• When velocity is constant, acceleration is zero• See Figure 2-10 on page 50• Deceleration – magnitude of the velocity decreases over time
5. 5. Formulas (sheet)• For constant acceleration, average velocity is equal to initial velocity + final velocity divided by 2 (average• Displacement / time interval = initial velocity + final velocity / 2
6. 6. Acceleration (cont.)• Displacement with constant uniform acceleration –Displacement = ½ (initial velocity + final velocity) (time)