Equation for acceleration Acceleration Acceleration CHECK YOUR UNDERSTANDING An

# Equation for acceleration acceleration acceleration

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Equation for acceleration: Acceleration =
Acceleration CHECK YOUR UNDERSTANDING An automobile cannot maintain a constant speed when A. accelerating. B. rounding a curve. C. both of the above D. none of the above
Acceleration CHECK YOUR ANSWER An automobile cannot maintain a constant speed when A. accelerating. B. rounding a curve. C. both of the above D. none of the above Comment: When rounding a curve, the automobile is accelerating because it is changing direction.
Acceleration CHECK YOUR UNDERSTANDING Acceleration and velocity are actually A. much the same. B. rates, but for different quantities. C. the same when direction is not a factor. D. the same for free-fall situations.
Acceleration CHECK YOUR ANSWER Acceleration and velocity are actually A. much the same. B. rates, but for different quantities. C. the same when direction is not a factor. D. the same for free-fall situations. Explanation: Velocity is the rate at which distance changes with time; acceleration is the rate at which velocity changes with time.
Acceleration Free fall When the only force acting on a falling object is gravity (with negligible air resistance), the object is in a state of free fall.
Acceleration CHECK YOUR UNDERSTANDING If a falling object gains 10 m/s each second it falls, its acceleration is A. 10 m/s. B. 10 m/s per second. C. both of the above D. neither of the above
Acceleration CHECK YOUR ANSWER If a falling object gains 10 m/s each second it falls, its acceleration is A. 10 m/s. B. 10 m/s per second. C. both of the above D. neither of the above Explanation: It is common to express 10 m/s per second as 10 m/s/s, or 10 m/s 2 .
Acceleration CHECK YOUR UNDERSTANDING A free-falling object has a speed of 30 m/s at one instant. Exactly one second later its speed will be A. the same. B. 35 m/s. C. greater than 35 m/s. D. 60 m/s.
Acceleration CHECK YOUR ANSWER A free-falling object has a speed of 30 m/s at one instant. Exactly one second later its speed will be A. the same. B. 35 m/s. C. greater than 35 m/s. D. 60 m/s. Explanation: One second later its speed will be 40 m/s, which is greater than 35 m/s.
Acceleration CHECK YOUR UNDERSTANDING The distance fallen by a free-falling body A. remains constant each second of fall. B. increases each second when falling. C. decreases each second when falling. D. none of the above
Acceleration CHECK YOUR ANSWER The distance fallen by a free-falling body A. remains constant each second of fall. B. increases each second when falling. C. decreases each second when falling. D. none of the above Explanation: See Table 2.2 for verification of this. Falling distance time squared.

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• Spring '14
• AnnM.Robinson