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

When water at the top of a waterfall falls to the bottom, what type of energy is the kinetic energy of the water transformed into?

Nuclear energy

Chemical energy

Thermal energy

Potential energy

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Verified step by step guidance

Identify the initial and final states of the water: Initially, the water is at the top of the waterfall with potential energy due to its height. As it falls, this potential energy is converted into kinetic energy.

Understand the energy transformation: As the water reaches the bottom of the waterfall, its kinetic energy is transformed into another form of energy due to the impact and friction with the ground and surrounding air.

Consider the types of energy involved: The kinetic energy of the water is primarily transformed into thermal energy due to the friction and turbulence as the water hits the bottom, causing the water molecules to move more vigorously, increasing the temperature slightly.

Eliminate other energy types: Nuclear energy and chemical energy are not involved in this process as there are no nuclear reactions or chemical changes occurring in the water during its fall.

Conclude the energy transformation: Therefore, the kinetic energy of the water at the bottom of the waterfall is primarily transformed into thermal energy.