# Physics - in-depth

#### Learn about the nature and physical properties of matter and energy. Created by Khan Academy.Recommended that you have a strong foundation in Algebra and Trigonometry before taking this course.

40 hours

Intermediate

##### Pick a lesson

1: Introduction to Vectors and Scalars
2: Calculating Average Velocity or Speed
3: Solving for Time
4: Displacement from Time and Velocity Example
5: Acceleration
6: Newton's First Law of Motion
7: Newton's Second Law of Motion
8: Newton's Third Law of Motion
9: Airbus A380 Take-off Time
10: Airbus A380 Take-off Distance
11: Why Distance is Area under Velocity-Time Line
12: Average Velocity for Constant Acceleration
13: Acceleration of Aircraft Carrier Takeoff
14: Race Cars with Constant Speed Around Curve
15: Introduction to Gravity
16: Mass and Weight Clarification
17: Gravity for Astronauts in Orbit
18: Would a Brick or Feather Fall Faster
19: Deriving Displacement as a Function of Time, Acceleration and Initial Velocity
20: Plotting Projectile Displacement, Acceleration, and Velocity
21: Projectile Height Given Time
22: Deriving Max Projectile Displacement Given Time
23: Impact Velocity From Given Height
24: Visualizing Vectors in 2 Dimensions
25: Projectile at an Angle
26: Different Way to Determine Time in Air
27: Launching and Landing on Different Elevations
28: Total Displacement for Projectile
29: Total Final Velocity for Projectile
30: Correction to Total Final Velocity for Projectile
31: Projectile on an Incline
32: Unit Vectors and Engineering Notation
33: Optimal angle for a projectile part 1
34: Optimal angle for a projectile part 2 - Hangtime
35: Optimal angle for a projectile part 3 - Horizontal distance as a function of angle (and speed)
36: Optimal angle for a projectile part 4 Finding the optimal angle and distance with a bit of calculus
37: Normal Force and Contact Force
38: Normal Force in an Elevator
39: Inclined Plane Force Components
40: Ice Accelerating Down an Incline
41: Force of Friction Keeping the Block Stationary
42: Correction to Force of Friction Keeping the Block Stationary
43: Force of Friction Keeping Velocity Constant
44: Intuition on Static and Kinetic Friction Comparisons
45: Static and Kinetic Friction Example
46: Introduction to Tension
47: Tension (part 2)
48: Tension in an accelerating system and pie in the face
49: Private video
50: Private video
51: Introduction to Momentum
52: Momentum: Ice skater throws a ball
53: 2-dimensional momentum problem
54: 2-dimensional momentum problem (part 2)
55: Introduction to work and energy
56: Work and Energy (part 2)
57: Conservation of Energy
58: Work/Energy problem with Friction
59: Introduction to mechanical advantage
60: Mechanical Advantage (part 2)
61: Mechanical Advantage (part 3)
62: Center of Mass
63: Introduction to Torque
64: Moments
65: Moments (part 2)
66: Unit Vector Notation
67: Unit Vector Notation (part 2)
68: Private video
69: Private video
70: Projectile Motion with Ordered Set Notation
71: Centripetal Force and Acceleration Intuition
72: Visual Understanding of Centripetal Acceleration Formula
73: Relationship between angular velocity and speed
74: Calculus proof of centripetal acceleration formula
75: Loop De Loop Question
76: Loop De Loop Answer part 1
77: Loop De Loop Answer part 2
78: Acceleration Due to Gravity at the Space Station
79: Space Station Speed in Orbit
80: Conservation of angular momemtum
81: Introduction to Newton's Law of Gravitation
82: Gravitation (part 2)
83: Intro to springs and Hooke's Law
84: Potential energy stored in a spring
85: Spring potential energy example (mistake in math)
86: Introduction to Harmonic Motion
87: Harmonic Motion Part 2 (calculus)
88: Harmonic Motion Part 3 (no calculus)
89: Fluids (part 1)
90: Fluids (part 2)
91: Fluids (part 3)
92: Fluids (part 4)
93: Fluids (part 5)
94: Fluids (part 6)
95: Fluids (part 7)
96: Fluids (part 8)
97: Fluids (part 9)
98: Fluids (part 10)
99: Fluids (part 11)
100: Fluids (part 12)
101: Thermodynamics (part 1)
102: Thermodynamics (part 2)
103: Thermodynamics (part 3)
104: Thermodynamics (part 4)
105: Thermodynamics (part 5)
106: Electrostatics (part 1): Introduction to Charge and Coulomb's Law
107: Electrostatics (part 2)
108: Proof (Advanced): Field from infinite plate (part 1)
109: Proof (Advanced): Field from infinite plate (part 2)
110: Electric Potential Energy
111: Electric Potential Energy (part 2-- involves calculus)
112: Voltage
113: Capacitance
114: Circuits (part 1)
115: Circuits (part 2)
116: Circuits (part 3)
117: Circuits (part 4)
118: Cross product 1
119: Cross Product 2
120: Cross Product and Torque
121: Introduction to Magnetism
122: Magnetism 2
123: Magnetism 3
124: Magnetism 4
125: Magnetism 5
126: Magnetism 6: Magnetic field due to current
127: Magnetism 7
128: Magnetism 8
129: Magnetism 9: Electric Motors
130: Magnetism 10: Electric Motors
131: Magnetism 11: Electric Motors
132: Magnetism 12: Induced Current in a Wire
133: The dot product
134: Dot vs. Cross Product
135: Calculating dot and cross products with unit vector notation
136: Introduction to Waves
137: Amplitude, Period, Frequency and Wavelength of Periodic Waves
138: Introduction to the Doppler Effect
139: Doppler effect formula for observed frequency
140: Doppler effect formula when source is moving away
141: When the source and the wave move at the same velocity
142: Mach Numbers
143: Specular and Diffuse Reflection
144: Specular and Diffuse Reflection 2
145: Refraction and Snell's Law
146: Refraction in Water
147: Snell's Law Examples 1
148: Snell's Law Example 2
149: Total Internal Reflection
150: Virtual Image
151: Parabolic Mirrors and Real Images
152: Parabolic Mirrors 2
153: Convex Parabolic Mirrors
154: Convex Lenses
155: Convex Lens Examples
156: Concave Lenses
157: Object Image and Focal Distance Relationship (Proof of Formula)
158: Object Image Height and Distance Relationship
159: Viewing g as the value of Earth's Gravitational Field Near the Surface