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

9. Work & Energy

Intro to Energy & Kinetic Energy

Physics

9. Work & Energy

Intro to Energy & Kinetic Energy

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Multiple Choice

How does kinetic energy differ from potential energy?

Kinetic energy depends on the temperature of an object, while potential energy does not.

Kinetic energy can be converted into mass, while potential energy cannot.

Kinetic energy is the energy of motion, while potential energy is the energy stored due to an object's position or configuration.

Kinetic energy is always greater than potential energy for any object.

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Verified step by step guidance

Kinetic energy is defined as the energy an object possesses due to its motion. It is given by the formula:

K = \frac{1}{2} m v^{2}

, where

m

is the mass of the object and

v

is its velocity.

Potential energy, on the other hand, is the energy stored in an object due to its position or configuration. A common form of potential energy is gravitational potential energy, which is given by:

U = m g h

, where

m

is the mass,

g

is the acceleration due to gravity, and

h

is the height above a reference point.

Kinetic energy is directly related to the motion of an object. If an object is at rest, its kinetic energy is zero. As the object's speed increases, its kinetic energy increases.

Potential energy is related to the position of an object within a force field, such as a gravitational or electric field. It represents the potential for an object to do work due to its position.

The conversion between kinetic and potential energy is a fundamental concept in physics, often observed in systems like pendulums or roller coasters, where energy is continuously transformed between kinetic and potential forms without loss in an ideal system.