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2-Kinematics-practice.pdf

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Department
Physics
Course
PHYSICS 1L03
Professor
Reza Nejat
Semester
Fall

Description
Phys 1L03 Conceptual Multiple choices questions 2- Kinematics 1. A person run 100 m in 14 s then turn around and jog 75 m back toward the starting point in 45 s. the average speed of the person in the total trip is: a. 0 b. 3 m/s c. 3.6 m/s d. 4.4 m/s e. 8.8 m/s 2. John starts in Hamilton, drives to Oakville, 39 km away in 0.5 h, stay there for 25 min, then drive to Toronto, 46 km away in 40 min, stay in Toronto for 1 hour, then return back straight to Hamilton in 55 min. What is the average speed of John in this round trip? a. 0 b. 49 km/h c. 54 km/h d. 80 km/h e. 82 km/h 3. John starts in Hamilton, drives to Oakville, 39 km away in 0.5 h, stay there for 25 min, then drive to Toronto, 46 km away in 40 min, stay in Toronto for 1 hour, then return back straight to Hamilton in 55 min. What is the average velocity of John in this round trip? a. 0 b. 49 km/h c. 54 km/h d. 80 km/h e. 83 km/h 4. An object has a velocity directed to the right, and an acceleration directed to the left. Which statement below is true? a. The position of the object is increasing to the right with time, and its speed is decreasing. b. The position of the object is not changing in time. c. The position of the object is increasing to the left with time, and its speed is increasing. d. The position of the object is increasing to the right with time, and its speed is increasing. e. The position of the object is increasing to the left with time, and its speed is decreasing. 5. on a position-time graph, a straight line sloping upward to the right corresponds to motion at: a. zero velocity b. constant velocity. c. increasing velocity d. decreasing velocity e. negative constant velocity 6. A person initially at point C on the x-axis stays there a moment, then walks along the axis to point A, stays there for a little while, and then runs quickly to point B and remains there. Which of the following graphs correctly shows the person’s motion? e: None of these 7. The figure below shows the position of a particle (moving along a straight line) as a function of time. Which of the following statements is true? a. The object is moving at a constant velocity, b. The object is accelerating (speeding up). c. The object is decelerating (slowing down). d. The object is not moving (resting). 8. An object goes from one point to another. After it arrives at its destination, its displacement is: a. either greater than or equal to the distance it traveled. b. always greater than the distance it traveled. c. always equal to the distance it traveled. d. always smaller than the distance it traveled. e. always smaller than or equal to the distance it traveled. 9. The graph below shows the position of an object as a function of time. The graph shows that the object: a. speed up all the time. b. slows down all the time c. moves with a constant velocity. d. speeds u
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