﻿ Physics Videos - Page 16 | Safe Videos for Kids
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# Physics

• 09:25

### Introduction to Torque

/ 159 views

An introduction to torque More free lessons at: http://www.khanacademy.org/video?v=QhuJn8YBtmg

• 09:36

### Center of Mass

/ 157 views

Introduction to the center of mass More free lessons at: http://www.khanacademy.org/video?v=VrflZifKIuw

• 10:35

/ 171 views

Introduction to pulleys and wedges More free lessons at: http://www.khanacademy.org/video?v=vSsK7Rfa3yA

• 06:50

/ 148 views

More on mechanical advantage, levers and moments. More free lessons at: http://www.khanacademy.org/video?v=DiBXxWBrV24

• 10:02

/ 160 views

Introduction to simple machines, mechanical advantage and moments. More free lessons at: http://www.khanacademy.org/video?v=pfzJ-z5Ij48

• 10:05

### Work/Energy problem with Friction

/ 176 views

A conservation of energy problem where all of the energy is not conserved. More free lessons at: http://www.khanacademy.org/video?v=YvacYWgygaA

• 10:07

### Conservation of Energy

/ 209 views

Using the law of conservation of energy to see how potential energy is converted into kinetic energy More free lessons at: http://www.khanacademy.org/video?v=kw_4Loo1HR4

• 09:52

### Work and Energy (part 2)

/ 186 views

More on work. Introduction to Kinetic and Potential Energies. More free lessons at: http://www.khanacademy.org/video?v=3mier94pbnU

• 09:18

### Introduction to work and energy

/ 197 views

Introduction to work and energy More free lessons at: http://www.khanacademy.org/video?v=2WS1sG9fhOk

• 09:33

### 2-dimensional momentum problem (part 2)

/ 156 views

We finish the 2-dimensional momentum problem More free lessons at: http://www.khanacademy.org/video?v=leudxqivIJI

• 10:36

### 2-dimensional momentum problem

/ 151 views

An example of conservation of momentum in two dimensions. More free lessons at: http://www.khanacademy.org/video?v=CFygKiTB-4A

• 06:01

### Momentum: Ice skater throws a ball

/ 195 views

A simple conservation of momentum problem involving an ice skater and a ball More free lessons at: http://www.khanacademy.org/video?v=vPkkCOlGND4

• 09:18

### Introduction to Momentum

/ 136 views

What momentum is. A simple problem involving momentum. More free lessons at: http://www.khanacademy.org/video?v=XFhntPxow0U

• 09:29

### Tension in an accelerating system and pie in the face

/ 179 views

The second part to the complicated problem. We figure out the tension in the wire connecting the two masses. Then we figure our how much we need to accelerate a pie for it to safely reach a man's face. More free lessons at: http://www.khanacademy.org/vide

• 10:19

### Tension (part 2)

/ 153 views

A slightly more difficult tension problem. More free lessons at: http://www.khanacademy.org/video?v=zwDJ1wVr7Is

• 10:20

### Introduction to Tension

/ 138 views

An introduction to tension. Solving for the tension(s) in a set of wires when a weight is hanging from them. More free lessons at: http://www.khanacademy.org/video?v=_UrfHFEBIpU

• 09:50

### Static and Kinetic Friction Example

/ 177 views

Thinking about the coefficients of static and kinetic friction More free lessons at: http://www.khanacademy.org/video?v=ZA_D4O6l1lo

• 07:21

### Intuition on Static and Kinetic Friction Comparisons

/ 156 views

Why static friction is harder to overcome than kinetic friction More free lessons at: http://www.khanacademy.org/video?v=J9BWNiOSGlc

• 09:10

### Force of Friction Keeping Velocity Constant

/ 172 views

Calculating the coefficient of kinetic friction (correction made in next video) More free lessons at: http://www.khanacademy.org/video?v=iA7Thhnzc64

• 00:51

### Correction to Force of Friction Keeping the Block Stationary

/ 137 views

Correction to Force of Friction Keeping the Block Stationary More free lessons at: http://www.khanacademy.org/video?v=BukTc4q9BMc

• 08:41

### Force of Friction Keeping the Block Stationary

/ 163 views

Block of wood kept stationary by the force of friction (Correction made in next video) More free lessons at: http://www.khanacademy.org/video?v=v8ODIMqbQ44

• 10:37

### Ice Accelerating Down an Incline

/ 176 views

Figuring out the acceleration of ice down a plane made of ice More free lessons at: http://www.khanacademy.org/video?v=Mz2nDXElcoM

• 12:43

### Inclined Plane Force Components

/ 212 views

Figuring out the components of the force due to gravity that are parallel and perpendicular to the surface of an inclined plane More free lessons at: http://www.khanacademy.org/video?v=TC23wD34C7k

• 11:49

### Normal Force in an Elevator

/ 205 views

How the normal force changes when an elevator accelerates More free lessons at: http://www.khanacademy.org/video?v=hoRsHNSrMpc

• 07:18

### Normal Force and Contact Force

/ 175 views

The force that keeps a block of ice from falling towards the center of the earth More free lessons at: http://www.khanacademy.org/video?v=1WOrgrIcQZU

• 10:41

/ 160 views

• 02:39

### Optimal angle for a projectile part 3 - Horizontal distance as a function of angle (and speed)

/ 190 views

Horizontal distance as a function of angle (and speed) More free lessons at: http://www.khanacademy.org/video?v=-h_x8TwC1ik

• 04:12

### Optimal angle for a projectile part 2 - Hangtime

/ 149 views

Optimal angle for a projectile part 2 - Hangtime More free lessons at: http://www.khanacademy.org/video?v=XtAB9GOfLiM

• 05:50

/ 152 views

• 07:58

### Unit Vectors and Engineering Notation

/ 189 views

Using unit vectors to represent the components of a vector More free lessons at: http://www.khanacademy.org/video?v=2QjdcVTgTTA

• 18:17

### Projectile on an Incline

/ 144 views

Challenging problem of a projectile on an inclined plane More free lessons at: http://www.khanacademy.org/video?v=jNESnky3RVg

• 02:41

### Correction to Total Final Velocity for Projectile

/ 139 views

Correction to "Total Final Velocity for Projectile" Video More free lessons at: http://www.khanacademy.org/video?v=DNoDJlB0ygU

• 07:53

### Total Final Velocity for Projectile

/ 170 views

Calculating the total final velocity for a projectile landing at a different altitude (mistake near end: I write 29.03 when it should be 26.03 m/s and the final total magnitude should be 26.55 m/s 78.7 degrees below horizontal More free lessons at: http:/

• 13:46

### Total Displacement for Projectile

/ 126 views

Reconstructing the total displacement vector for a projectile More free lessons at: http://www.khanacademy.org/video?v=UXORCpvKYiI

• 15:12

### Launching and Landing on Different Elevations

/ 168 views

More complicated example involving launching and landing at different elevations More free lessons at: http://www.khanacademy.org/video?v=a5QnXi_lZII

• 09:47

### Different Way to Determine Time in Air

/ 205 views

Another way to determine time in the air given an initial vertical velocity More free lessons at: http://www.khanacademy.org/video?v=_NWc3C3cTNA

• 12:47

### Projectile at an Angle

/ 147 views

Figuring out the horizontal displacement for a projectile launched at an angle More free lessons at: http://www.khanacademy.org/video?v=ZZ39o1rAZWY

• 12:54

### Visualizing Vectors in 2 Dimensions

/ 181 views

Visualizing, adding and breaking down vectors in 2 dimensions More free lessons at: http://www.khanacademy.org/video?v=xp6ibuI8UuQ

• 11:43

### Impact Velocity From Given Height

/ 255 views

Determining how fast something will be traveling upon impact when it is released from a given height More free lessons at: http://www.khanacademy.org/video?v=2ZgBJxT9pbU

• 07:09

### Deriving Max Projectile Displacement Given Time

/ 176 views

Deriving a formula for maximum projectile displacement as a function of elapsed time More free lessons at: http://www.khanacademy.org/video?v=P7LKEkcNibo

• 08:51

### Projectile Height Given Time

/ 222 views

Figuring out how high a ball gets given how long it spends in the air More free lessons at: http://www.khanacademy.org/video?v=IYS4Bd9F3LA

• 16:18

### Plotting Projectile Displacement, Acceleration, and Velocity

/ 153 views

Plotting projectile displacement, acceleration, and velocity as a function to change in time More free lessons at: http://www.khanacademy.org/video?v=T0zpF_j7Mvo

• 09:58

### Deriving Displacement as a Function of Time, Acceleration and Initial Velocity

/ 190 views

Deriving displacement as a function of time, constant acceleration and initial velocity More free lessons at: http://www.khanacademy.org/video?v=wlB0x9W-qBU

• 10:35

### Would a Brick or Feather Fall Faster

/ 200 views

What would fall faster on the moon? More free lessons at: http://www.khanacademy.org/video?v=36Rym2q4H94

• 10:41

### Mass and Weight Clarification

/ 167 views

Difference between mass and weight More free lessons at: http://www.khanacademy.org/video?v=IuBoeDihLUc

• 15:43

### Introduction to Gravity

/ 219 views

Basics of gravity and the Law of Universal Gravitation More free lessons at: http://www.khanacademy.org/video?v=Xcel427Ezl0

• 04:49

### Race Cars with Constant Speed Around Curve

/ 231 views

When acceleration could involve a change in direction and not speed More free lessons at: http://www.khanacademy.org/video?v=ITA1rW5UraU

• 14:16

### Acceleration of Aircraft Carrier Takeoff

/ 171 views

Using what we know about takeoff velocity and runway length to determine acceleration More free lessons at: http://www.khanacademy.org/video?v=VYgSXBjEA8I

• 14:10

### Average Velocity for Constant Acceleration

/ 155 views

Calculating average velocity when acceleration is constant More free lessons at: http://www.khanacademy.org/video?v=MAS6mBRZZXA

• 09:26

### Why Distance is Area under Velocity-Time Line

/ 141 views

Understanding why distance is area under velocity-time line More free lessons at: http://www.khanacademy.org/video?v=d-_eqgj5-K8

• 05:30

### Airbus A380 Take-off Distance

/ 156 views

How long of a runway does as a380 need More free lessons at: http://www.khanacademy.org/video?v=fQt69_Q2CTw

• 08:08

### Airbus A380 Take-off Time

/ 178 views

Figuring how long it takes an a380 to take off given a constant acceleration More free lessons at: http://www.khanacademy.org/video?v=p4DTormtEG0

• 08:00

### Newton's Third Law of Motion

/ 193 views

Every action has an equal and opposite reaction More free lessons at: http://www.khanacademy.org/video?v=By-ggTfeuJU

• 07:14

### Newton's Second Law of Motion

/ 177 views

Newton's Second Law of Motion: F=ma More free lessons at: http://www.khanacademy.org/video?v=ou9YMWlJgkE

• 09:06

### Acceleration

/ 200 views

Calculating the acceleration of a Porshe More free lessons at: http://www.khanacademy.org/video?v=FOkQszg1-j8

• 05:00

### Displacement from Time and Velocity Example

/ 159 views

Worked example of calculating displacement from time and velocity More free lessons at: http://www.khanacademy.org/video?v=lQ-dvt3V4yQ

• 09:35

### Solving for Time

/ 171 views

Simple example of solving for time given distance and rate More free lessons at: http://www.khanacademy.org/video?v=awzOvyMKeMA

• 11:46

### Calculating Average Velocity or Speed

/ 163 views

Example of calculating speed and velocity More free lessons at: http://www.khanacademy.org/video?v=oRKxmXwLvUU

• 08:39

### Introduction to Vectors and Scalars

/ 161 views

Distance, displacement, speed and velocity. Difference between vectors and scalars More free lessons at: http://www.khanacademy.org/video?v=ihNZlp7iUHE

• 13:41

### Energy Inputs for Tilling a Hectare of Land

/ 204 views

Thinking about energy consumption for tilling land More free lessons at: http://www.khanacademy.org/video?v=5I9dH5im24U

• 10:26

### IIT JEE Perpendicular Planes (Part 1)

/ 319 views

2010 IIT JEE Paper 1 #30 normal vector and planes (Part 1) More free lessons at: http://www.khanacademy.org/video?v=2u535-HVJ_o

• 07:41

### Centripetal Acceleration (part 3)

/ 128 views

How fast does a car need to go to complete a loop-d-loop.

• 08:10

### Introduction to angular velocity

/ 188 views

Angular velocity or how fast something is spinning.

• 10:14

### Calculus Proof that a=v^2/r

/ 202 views

Using calculus and vectors to show that centripetal acceleration = v^2/r

• 10:01

### Visual Proof: a= v^2/r

/ 159 views

Visual proof that centripetal acceleration = v^2/r

• 10:11

### Centripetal Acceleration (part 2)

/ 157 views

More intuition on centripetal acceleration. A simple orbit problem.

• 10:08

### Introduction to centripetal acceleration (part 1)

/ 175 views

Intuition behind what it takes to make something travel in a circle

• 04:07

### 2-dimensional projectile motion part 5

/ 178 views

The second part of the last projectile motion problem

• 09:06

### 2 dimensional projectile motion part 4

/ 138 views

Another example of a 2-dimensional projectile motion problem

• 09:14

### 2-dimensional projectile motion (part 3)

/ 179 views

Completing our first example from parts 1 and 2

• 09:57

### 2 dimensional projectile motion (part 2)

/ 166 views

More on 2 dimensional projectile motion

• 09:20

### 2 dimensional projectile motion (part 1)

/ 181 views

Using vectors to solve 2 dimensional projectile motion problems

• 09:20

### Newton's Third Law of Motion

/ 183 views

Intuition behind Newton's Third Law of Motion

• 09:49

### Newton's Second Law of Motion

/ 212 views

An introduction to Newton's Second Law of Motion. F=ma

• 09:28

### Newton's First Law of Motion

/ 204 views

Introduction to newton's first law of motion. Inertial frames of reference.

• 10:06

### Projectile motion (part 10)

/ 174 views

Some more examples with projectile motion

• 08:22

### Projectile motion (part 9)

/ 150 views

Another example of projectile motion.

• 01:46

### Projectile motion (part 8)

/ 152 views

A little leftover from part 7

• 10:35

### Projectile motion (part 7)

/ 134 views

How high did the ball go?

• 09:49

### Projectile motion (part 6)

/ 132 views

More on the ball throwing game

• 09:34

### Projectile motion (part 5)

/ 143 views

How fast was the ball that you threw upwards? More free lessons at: http://www.khanacademy.org/video?v=dlpmllTx5MY

• 08:58

### Projectile motion (part 4)

/ 135 views

Solving for time when you are given the change in distance, acceleration, and initial velocity More free lessons at: http://www.khanacademy.org/video?v=-W3RkgvLrGI

• 09:05

### Projectile motion (part 3)

/ 161 views

An example of solving for the final velocity when you know the change in distance, time, initial velocity, and acceleration More free lessons at: http://www.khanacademy.org/video?v=Y5cSGxdDHz4

• 09:15

### Projectile motion (part 2)

/ 150 views

A derivation of a new motion equation More free lessons at: http://www.khanacademy.org/video?v=emdHj6WodLw

• 09:09

### Projectile motion (part 1)

/ 157 views

Using the equations of motion to figure out things about falling objects More free lessons at: http://www.khanacademy.org/video?v=15zliAL4llE

• 04:32

### Introduction to motion (part 3)

/ 117 views

Using the basic equations of distance and velocity to solve motion problems

• 09:38

### Introduction to motion (part 2)

/ 134 views

More on how velocity, distance, acceleration and time relate to each other.

• 09:11

### Introduction to motion

/ 165 views

Introduction to basic physics of motion. Introduces the concept of variable velocity/acceleration.

• 07:17

### Are Southern Hemisphere Seasons More Severe?

/ 319 views

Are Southern Hemisphere seasons more severe because of the eccentricity in Earth's orbit? More free lessons at: http://www.khanacademy.org/video?v=umvNQj-zmq4

• 13:19

### Plate Tectonics -- Evidence of plate movement

/ 337 views

Plate Tectonics -- Evidence of plate movement More free lessons at: http://www.khanacademy.org/video?v=6EdsBabSZ4g

• 10:08

### Earth Formation

/ 313 views

How the Earth is a the byproduct of a local supernova More free lessons at: http://www.khanacademy.org/video?v=VbNXh0GaLYo

• 08:13

### Why Gravity Gets So Strong Near Dense Objects

/ 172 views

Why Gravity Gets So Strong Near Dense Objects More free lessons at: http://www.khanacademy.org/video?v=RpOHZc6cDIw

• 10:09

### Black Holes

/ 398 views

Black Holes More free lessons at: http://www.khanacademy.org/video?v=JoL2pO3O0rg

• 11:12

### Hubble's Law

/ 329 views

Hubble's Law More free lessons at: http://www.khanacademy.org/video?v=1V9wVmO0Tfg

Featured
• 10:03

### Carbon 14 Dating 1

/ 226 views

Carbon 14 Dating 1 More free lessons at: http://www.khanacademy.org/video?v=8wYvKeSK1IY

• 11:20

### Richter Scale

/ 290 views

The basics of the logarithmic Richter and Moment Magnitude Scales to measure earthquakes More free lessons at: http://www.khanacademy.org/video?v=RFn-IGlayAg

• 09:33

### Newton's First Law of Motion

/ 205 views

Newton's First Law (Galileo's Law of Inertia). More free lessons at: http://www.khanacademy.org/video?v=CQYELiTtUs8

• 09:37

/ 171 views

• 09:31

### Scale of Earth and Sun

/ 264 views

Scale of Earth and Sun More free lessons at: http://www.khanacademy.org/video?v=GZx3U0dbASg

• 13:14

### Scale of the Small

/ 196 views

From honey bees to cells, virus, and atoms -- understanding the scale of the very small More free lessons at: http://www.khanacademy.org/video?v=ERKx3Oa2omo

• 13:09

### Elements and Atoms

/ 281 views

How elements relate to atoms. The basics of how protons, electrons and neutrons make up an atom. More free lessons at: http://www.khanacademy.org/video?v=IFKnq9QM6_A

• 03:34

### Galactic Collisions

/ 148 views

Collision of the Milky Way Galaxy with Andromeda (forming "Milkomeda") More free lessons at: http://www.khanacademy.org/video?v=QXYbGZ3T3_k

• 07:12

### Gravity for Astronauts in Orbit

/ 230 views

Why do astronauts appear weightless despite being near the Earth? More free lessons at: http://www.khanacademy.org/video?v=oIZV-ixRTcY

• 20:47

### How Earth's Tilt Causes Seasons

/ 277 views

How being Earth's tilt causes seasons More free lessons at: http://www.khanacademy.org/video?v=05qDIjKevJo