204 PHYSICS LAB FINAL - FOLLOW UP COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)

QUESTION: 1a) If the position of an object is zero at one instant, what is true about the velocity of that object? (May be more than one.) Ans: the velocity could be negative, the velocity could be positive, the velocity could be zero QUESTION: 1b) The slope of a position versus time graph gives Ans: Velocity QUESTION: 1c) The motions of a car and a truck along a straight road are represented by the velocity-time graphs in the figure. The two vehicles are initially alongside each other at time t = 0. At time T, what is true of the distances traveled by the vehicles since time t = 0? Ans: The truck will have travelled further than the car 2 Master01 | Dec, 2024/2025 | Latest update QUESTION: 1d) Which of the following situations is impossible Ans: An object has constant non-zero velocity and changing acceleration. QUESTION: 1e) The figure shows a color coded graph of the position x of a red car and a blue car as a function of time t. According to this graph, which statements about these cars must be true? (May be more than one.) Ans: -Both cars have the same acceleration. -The cars meet at time t = 10 s. QUESTION: 2a) A motorist wishes to travel 40 kilometers at an average speed of 40 km/hr. During the first 20 kilometers, an average speed of 40 km/hr is maintained. During the next 10 kilometers, however, the motorist goofs off and averages only 20 km/hr. To drive the last 10 kilometers and average 40 km/hr, the motorist must drive Ans: faster than the speed of light 3 Master01 | Dec, 2024/2025 | Latest update QUESTION: 2b) Suppose that a car traveling to the west begins to slow down as it approaches a traffic light. Which of the following statements about its acceleration is correct? (May be more than one) Ans: -The acceleration is toward the east. -Since the car is slowing down, its acceleration must be negative. QUESTION: 2c) The motion of an object is described in the velocity vs. time graph shown in the figure. (-2.5 m/s to 3.5 m/s). Over the nine-second interval shown, we can say that the speed of the particle