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# Physics

• Khan Academy
• 159 videos
• 2,085,623 views
• Last updated on Jul 2, 2014
Projectile motion, mechanics and electricity and magnetism. Solid understanding of algebra and a basic understanding of trigonometry necessary.

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•  Introduction to Vectors and Scalars 8:39 Calculating Average Velocity or Speed 11:46 Solving for Time 9:35 Displacement from Time and Velocity Example 5:00 Acceleration 9:06 Newton's First Law of Motion 9:32 Newton's Second Law of Motion 7:14 Newton's Third Law of Motion 8:00 Airbus A380 Take-off Time 8:08 Airbus A380 Take-off Distance 5:30 Why Distance is Area under Velocity-Time Line 9:26 Average Velocity for Constant Acceleration 14:10 Acceleration of Aircraft Carrier Takeoff 14:16 Race Cars with Constant Speed Around Curve 4:49 Introduction to Gravity 15:43 Mass and Weight Clarification 10:41 Gravity for Astronauts in Orbit 7:12 Would a Brick or Feather Fall Faster 10:35 Deriving Displacement as a Function of Time, Acceleration and Initial Velocity 9:58 Plotting Projectile Displacement, Acceleration, and Velocity 16:18 Projectile Height Given Time 8:51 Deriving Max Projectile Displacement Given Time 7:09 Impact Velocity From Given Height 11:43 Visualizing Vectors in 2 Dimensions 12:54 Projectile at an Angle 12:47 Different Way to Determine Time in Air 9:47 Launching and Landing on Different Elevations 15:12 Total Displacement for Projectile 13:46 Total Final Velocity for Projectile 7:53 Correction to Total Final Velocity for Projectile 2:41 Projectile on an Incline 18:17 Unit Vectors and Engineering Notation 7:58 Optimal angle for a projectile part 1 5:50 Optimal angle for a projectile part 2 - Hangtime 4:12 Optimal angle for a projectile part 3 - Horizontal distance as a function of angle (and speed) 2:39 Optimal angle for a projectile part 4 Finding the optimal angle and distance with a bit of calculus 10:41 Normal Force and Contact Force 7:18 Normal Force in an Elevator 11:49 Inclined Plane Force Components 12:43 Ice Accelerating Down an Incline 10:37 Force of Friction Keeping the Block Stationary 8:41 Correction to Force of Friction Keeping the Block Stationary 0:51 Force of Friction Keeping Velocity Constant 9:10 Intuition on Static and Kinetic Friction Comparisons 7:21 Static and Kinetic Friction Example 9:50 Introduction to Tension 10:20 Tension (part 2) 10:19 Tension in an accelerating system and pie in the face 9:29 [Private Video] [Private Video] Introduction to Momentum 9:18 Momentum: Ice skater throws a ball 6:01 2-dimensional momentum problem 10:36 2-dimensional momentum problem (part 2) 9:33 Introduction to work and energy 9:18 Work and Energy (part 2) 9:52 Conservation of Energy 10:07 Work/Energy problem with Friction 10:05 Introduction to mechanical advantage 10:02 Mechanical Advantage (part 2) 6:50 Mechanical Advantage (part 3) 10:35 Center of Mass 9:36 Introduction to Torque 9:25 Moments 14:14 Moments (part 2) 13:50 Unit Vector Notation 9:54 Unit Vector Notation (part 2) 9:13 [Private Video] [Private Video] Projectile Motion with Ordered Set Notation 10:18 Centripetal Force and Acceleration Intuition 10:47 Visual Understanding of Centripetal Acceleration Formula 9:48 Relationship between angular velocity and speed 9:24 Calculus proof of centripetal acceleration formula 14:22 Loop De Loop Question 3:01 Loop De Loop Answer part 1 6:05 Loop De Loop Answer part 2 4:48 Acceleration Due to Gravity at the Space Station 10:13 Space Station Speed in Orbit 6:36 Conservation of angular momemtum 10:12 Introduction to Newton's Law of Gravitation 8:38 Gravitation (part 2) 8:17 Intro to springs and Hooke's Law 10:06 Potential energy stored in a spring 10:00 Spring potential energy example (mistake in math) 9:39 Introduction to Harmonic Motion 10:04 Harmonic Motion Part 2 (calculus) 9:46 Harmonic Motion Part 3 (no calculus) 9:44 Fluids (part 1) 9:47 Fluids (part 2) 10:13 Fluids (part 3) 9:55 Fluids (part 4) 10:09 Fluids (part 5) 8:42 Fluids (part 6) 9:42 Fluids (part 7) 10:00 Fluids (part 8) 10:08 Fluids (part 9) 10:09 Fluids (part 10) 8:36 Fluids (part 11) 5:20 Fluids (part 12) 7:47
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