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Can You Find Ms. Finley??. Acceleration. Acceleration. Acceleration is a change in velocity Speed or direction. Centripetal Acceleration. Acceleration can mean a change in direction, not just speed Centripetal acceleration Acceleration that occurs in a circular motion.
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Acceleration • Acceleration is a change in velocity • Speed or direction
Centripetal Acceleration • Acceleration can mean a change in direction, not just speed • Centripetal acceleration • Acceleration that occurs in a circular motion
Calculating Acceleration • Acceleration is the rate at which velocity changes • Can be positive (speeding up) or negative (slowing down) A = or
Acceleration Practice A turtle swimming in a straight line toward the shore has a speed of 0.50 m/s. After 4.0 s, its speed is 0.80 m/s. What is the turtle’s average acceleration? A= = = 0.08 m/s2
More Practice • Can you rearrange the formula to solve for other variables? Harold’s car accelerates at an average rate of 2.6 m/s2. How long will it take his car to speed up from 24.6 m/s to 26.8 m/s? a= 2.6 m/s2 = = t = = 0.85 seconds
Practice • A driver starts his parked car and within 5 seconds reaches a speed of 60 km/hr. What is his acceleration? • With an average acceleration of 0.50 m/s2, how long will it take a cyclist starting from rest to reach 13.5 m/s? • A car traveling at 7.0 m/s accelerates at the rate of 0.80 m/s2 for 2.0 s. What is the final velocity of the car?
Graphing Accelerated Motion • The slope on a speed vs. time graph is equal to the acceleration.
Velocity and Acceleration Lab • For 3 data sets: • Copy and complete the above chart • Graph distance vs. time and velocity vs. time • Based on the graphs, write a paragraph describing the person’s motion (speed, direction, acceleration, etc.)