Name:___________________________________________ Period:________ Date:_________ 1 In an experiment, an object is moved along a straight line with different types of motion. The graph above shows position versus time for the object during the first three seconds of its motion. Which one of the following is closest to the average speed of the object between during the first three seconds? A. 1.33 m/s B. 1 m/s C. 2 m/s D. 0.67 m/s 2 Which of the following pairs of graphs cannot possibly be describing the same object? A. B. C. D. Graphs A, B, C and D Graphs A, B, C, and E Graph B only Graph D only 3 The graph to the left shows velocity v versus time t for an object in linear motion. Which of the following is a possible graph of position x versus time t for this object? Name:___________________________________________ Period:________ Date:_________ 4 The graph to the left is a plot of position versus time. For which labeled region is the velocity negative and the acceleration positive? (A) A (B) B (C) C (D) D 5 (E) E Shown below is the velocity vs. time graph for a toy car moving along a straight line. What is the displacement of the car in the first 1.5 seconds? 4 (A) 3 m (B) 5 m (C) 6.5 m (D) 7 m (E) 7.5 m 2 6 An object moving along a straight line is slowing at a constant acceleration rate. Several data points are collected in the middle of the slowing process for the object’s velocity as a function of time. The data points are shown on the graph below, along with a best-fit line that has been inserted to extrapolate data for the entirety of the object’s motion. In using the graph to analyze the object’s motion, several different quantities about the best-fit line can be calculated. Which quantities would be equal to the object’s initial velocity and to the object’s displacement during its slowing motion? A. B. C. D. 7 Initial velocity: slope, Displacement: area under the line Initial velocity: x-intercept, Displacement: slope Initial velocity: y-intercept, Displacement: area under the line Initial velocity: slope, Displacement: y-intercept Given the graph of the velocity vs. time of a duck flying north. At what point did the duck stop its forward motion? (A) A (B) B (C) C (D) D (E) none of these points Name:___________________________________________ Period:________ Date:_________ 8 Consider the motion of an object given by the position vs. time graph shown. For what time(s) is the object moving the fastest? A. from 0-2 s B. from 2-3 s C. from 7-10 s D. It is impossible to know from a position-time graph what the velocity is. For 9 and 10 9 After 6 seconds, how far is the clown from her original starting point? (A) 18 m (B) 24 m (C) 34 m (D) 47 m (E) 74 m 1 0 What would be the acceleration of the clown at 1 s? (A) 1 m/s2 (B) 2 m/s2 (C) 3 m/s2 (D) none of the above Answers 1. 6. 2. 7. 3. 8. 4. 9. 5. 10. Name:___________________________________________ Period:________ Date:_________ 1 2 3 The above graph shows position as a function of time for an object moving along a straight line. During which time(s) is the object at rest? I. 0.5 seconds II. From 1 to 2 seconds III. 2.5 seconds A. I only B. II only C. III only D. I and III only An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original height. Which of the following position-time graphs would best represent the distance above the floor versus time for the bouncing ball? Given the graph of the velocity vs. time of a duck flying north. At what point did the duck turn around? (A) A (B) B (C) C (D) D (E) none of these points 4 The graph above is a plot of position versus time. For which labeled region is the velocity positive and the acceleration positive? (A) A (B) B (C) C (D) D (E) E Name:___________________________________________ Period:________ Date:_________ For 5 & 6 5 What would be the acceleration of the clown at 10 s? (A) -0.83 m/s2 (B) -8.0 m/s2 (C) -2.5 m/s2 (D) none of the above 6 After 4 seconds, how far is the clown from her original starting point? (A) 18 m (B) 24 m (C) 34 m (D) 47 m (E) 74 m 7 Which of the following pairs of graphs can possibly be describing the same object? A. B. C. D. 8 Graphs A, B, C and D Graphs A, B, C, and E Graph B only Graph E only The graph shows velocity as a function of time for a car. What was the acceleration at time t = 90 seconds? Name:___________________________________________ Period:________ Date:_________ 9 Shown below is the velocity vs. time graph for a toy car moving along a straight line. What is the displacement of the car from 2-3 seconds? (A) 0 m (B) -0.5 m (C) -1 m (D) 7 m (E) 7.5 m 10 What kind of velocity is the object experiencing during the full three seconds of the position-time graph to the left? A. A constant negative velocity. B. A positive velocity with a negative acceleration, followed by a negative velocity with an acceleration. C. A negative acceleration. D. None of the above Answers 1. 6. 2. 7. 3. 8. 4. 9. 5. 10.