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

Position-Time Graphs & Velocity

Physics

2. 1D Motion / Kinematics

Position-Time Graphs & Velocity

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Multiple Choice

Which motion diagram best represents the following event: a skier skis down a slope with constant speed?

A concave down increasing slope that plots nine estimated points between 0 second to eight seconds in increments of one second for each points.

A decreasing slope from left to right that plots seven estimated points between 0 second and 6 second in increment of 1 second. The estimated point at 0 second and one second are closer.

An increasing slope from right to left that plots eight estimated points between 0 second and 7 second in increment of 1 second.

A decreasing slope from left to right that plots eight estimated points between 0 second and 7 second in increment of 1 second.

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Verified step by step guidance

To determine which motion diagram represents a skier skiing down a slope with constant speed, we need to understand what constant speed implies in terms of motion diagrams.

Constant speed means that the skier covers equal distances in equal intervals of time. Therefore, the spacing between the dots in the motion diagram should be uniform.

Examine each motion diagram provided. Look for the one where the distance between consecutive dots is the same throughout the entire diagram.

In the first image, the spacing between the dots increases, indicating acceleration. In the second image, the spacing is not uniform, suggesting variable speed. The third image shows decreasing spacing, indicating deceleration.

The fourth image shows equal spacing between each dot, which is consistent with constant speed. Therefore, the fourth motion diagram best represents a skier skiing down a slope with constant speed.