Multiple Choice - Weebly



Practice 1.2C SolutionsMotion Graph 1Multiple ChoiceWhich of the following graphs could correctly represent the motion of an object moving with a constant speed in a straight line?Answer: CConstant speed is a constant slope on a position-time graph, a horizontal line on a velocity timegraph or a zero value on an acceleration-time graphGraph I only (B) Graphs II and V only (C) Graph II only (D) Graphs I and IV only (E) All of the above graphs represent constant velocity590550262255The graph above shows velocity v versus time t for an object in linear motion. Which of the following is apossible graph of position x versus time t for this object?Answer: AA velocity-time graph represents the slope of the displacement-time graph. Analyzing the v-tgraph shows a constant slope, then a decreasing slope to zero, becoming negative and increasing,then a constant slope. Note this is an analysis of the values of v, not the slope of the graph itselfUse the graph below to answer the following questions. The velocity vs. time graph for the motion of a car on a straight track is shown in the diagram. The thick linerepresents the velocity. Assume that the car starts at the origin x = 0. At which time is the car the greatest distance from the origin?t = 10 s (B) t = 6 s (C) t = 5s (D) t = 3s (E) t = 0 sThe car is the greatest distance just before it reverses direction at 5 seconds.What is the average speed of the car for the 10 second interval?1.20 m/s (B) 1.40 m/s (C) 3.30 m/s (D) 5.00 m/s (E) 5.40 m/sAverage speed = (total distance)/(total time), the total distance is the magnitude of the area underthe line (the area below the t-axis is considered positive)Free ResponseProblem 13337560000A position vs time graph is shown to the right. Please analyze the graph and determine the following. (a) The speed of the object from b c, (b) the speed from c d, (c) the speed from d e, (d) the times t when the speed of the object is zero, and (e) the points where the direction of the object had to change (if any).Problem 2Use the graph below to answer the following questions.What was the cart's instantaneous speed at 11 seconds? (3m/s)List two time intervals where the object has the same speed but different velocities. (2 m/sec: 4-10 seconds and 34-42 seconds)For each interval, find the object’s displacement.Time IntervalDisplacement0-4 s4-10 sWhat was the cart’s total displacement? (-4 m) What was the cart's average velocity during these 46 seconds? (0.087 m/s)What was the total distance the cart traveled for the entire 46 seconds? (64 m)What was the cart's average speed during these 46 seconds? (1.39 m/s)Problem 3Above is a velocity v. time graph. Sketch the position time graph below. Assume the object’s initial position is 0 m. Be sure to label the axes. ................
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