Table of contents

0. Math Review31m
- Math Review
  31m
1. Intro to Physics Units1h 29m
2. 1D Motion / Kinematics3h 56m
3. Vectors2h 43m
4. 2D Kinematics1h 42m
5. Projectile Motion3h 6m
6. Intro to Forces (Dynamics)3h 22m
7. Friction, Inclines, Systems2h 44m
8. Centripetal Forces & Gravitation7h 26m
9. Work & Energy1h 59m
10. Conservation of Energy2h 54m
11. Momentum & Impulse3h 40m
12. Rotational Kinematics2h 59m
13. Rotational Inertia & Energy7h 4m
14. Torque & Rotational Dynamics2h 5m
15. Rotational Equilibrium3h 39m
16. Angular Momentum3h 6m
17. Periodic Motion2h 9m
18. Waves & Sound3h 40m
19. Fluid Mechanics4h 27m
20. Heat and Temperature3h 7m
21. Kinetic Theory of Ideal Gases1h 50m
22. The First Law of Thermodynamics1h 26m
23. The Second Law of Thermodynamics3h 11m
24. Electric Force & Field; Gauss' Law3h 42m
25. Electric Potential1h 51m
26. Capacitors & Dielectrics2h 2m
27. Resistors & DC Circuits3h 8m
28. Magnetic Fields and Forces2h 23m
29. Sources of Magnetic Field2h 30m
30. Induction and Inductance3h 38m
31. Alternating Current2h 37m
32. Electromagnetic Waves2h 14m
33. Geometric Optics2h 57m
34. Wave Optics1h 15m
35. Special Relativity2h 10m

2. 1D Motion / Kinematics

Conceptual Problems with Position-Time Graphs

Physics

2. 1D Motion / Kinematics

Conceptual Problems with Position-Time Graphs

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Multiple Choice

Which of the following statements about position-time graphs is NOT correct?

A curved line indicates constant velocity.

A steeper slope indicates a higher speed.

A horizontal line indicates the object is at rest.

A negative slope indicates the object is moving in the opposite direction.

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Verified step by step guidance

Understand the concept of a position-time graph: A position-time graph plots the position of an object on the y-axis against time on the x-axis. The slope of the graph at any point gives the velocity of the object at that time.

Analyze the statement 'A curved line indicates constant velocity': A curved line on a position-time graph suggests that the slope is changing, which means the velocity is changing. Therefore, a curved line indicates acceleration, not constant velocity.

Consider the statement 'A steeper slope indicates a higher speed': On a position-time graph, the slope of the line represents the velocity. A steeper slope means a larger change in position over time, indicating a higher speed.

Evaluate the statement 'A horizontal line indicates the object is at rest': A horizontal line on a position-time graph means there is no change in position over time, indicating the object is at rest.

Review the statement 'A negative slope indicates the object is moving in the opposite direction': A negative slope on a position-time graph means the position is decreasing over time, indicating the object is moving in the opposite direction.