To calculate the acceleration of an object, the change in velocity is divided by the length of time interval over which the change occurred.
2.2 Acceleration
To calculate the change in velocity, subtract the initial velocityâ€”the velocity at the beginning of the time intervalâ€”from the final velocityâ€”the velocity at the end of the time interval.
When riders go around a sharp turn, they also are accelerated.
2.2 Acceleration
This acceleration makes them feel as if a force is pushing them toward the side of the car.
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2.2 Question 1 Acceleration is the rate of change of __________. Section Check
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2.2 Answer The correct answer is velocity. Acceleration occurs when an object changes its speed, direction, or both. Section Check
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2.2 Question 2 Which is NOT a form of acceleration? Section Check A. maintaining a constant speed and direction B. speeding up C. slowing down D. turning
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2.2 Answer The answer is A. Any change of speed or direction results in acceleration. Section Check
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2.2 Question 3 What is the acceleration of a hockey player who is skating at 10 m/s and comes to a complete stop in 2 s? Section Check A. 5 m/s 2 B. -5 m/s 2 C. 20 m/s 2 D. -20 m/s 2
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2.2 Answer The answer is B. Calculate acceleration by subtracting initial velocity (10 m/s) from final velocity (0), then dividing by the time interval (2s). Section Check (0 m/s â€“ 10 m/s) = â€“ 5 m/s 2s