en physics khanacademy 5/5 (1)

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Projectile motion, mechanics and electricity and magnetism. Solid understanding of algebra and a basic understanding of trigonometry necessary.

Lessons

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

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

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

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

Calculating the acceleration of a Porshe More free lessons at: http://www.khanacademy.org/video?v=FOkQs
775 views

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

Newton's Second Law of Motion: F=ma More free lessons at: http://www.khanacademy.org/video?v=ou9YM
807 views

Every action has an equal and opposite reaction More free lessons at: http://www.khanacademy.org/video?v=By-gg
600 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=p4DTo
789 views

How long of a runway does as a380 need More free lessons at: http://www.khanacademy.org/video?v=fQt69
704 views

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

Calculating average velocity when acceleration is constant More free lessons at: http://www.khanacademy.org/video?v=MAS6m
751 views

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

When acceleration could involve a change in direction and not speed More free lessons at: http://www.khanacademy.org/video?v=ITA1r
732 views

Basics of gravity and the Law of Universal Gravitation More free lessons at: http://www.khanacademy.org/video?v=Xcel4
838 views

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

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

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

Deriving displacement as a function of time, constant acceleration and initial velocity More free lessons at: http://www.khanacademy.org/video?v=wlB0x
765 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
725 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=IYS4B
673 views

Deriving a formula for maximum projectile displacement as a function of elapsed time More free lessons at: http://www.khanacademy.org/video?v=P7LKE
717 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=2ZgBJ
781 views

Visualizing, adding and breaking down vectors in 2 dimensions More free lessons at: http://www.khanacademy.org/video?v=xp6ib
764 views

Figuring out the horizontal displacement for a projectile launched at an angle More free lessons at: http://www.khanacademy.org/video?v=ZZ39o
631 views

Another way to determine time in the air given an initial vertical velocity More free lessons at: http://www.khanacademy.org/video?v=_NWc3
698 views

More complicated example involving launching and landing at different elevations More free lessons at: http://www.khanacademy.org/video?v=a5QnX
777 views

Reconstructing the total displacement vector for a projectile More free lessons at: http://www.khanacademy.org/video?v=UXORC
779 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. ...
678 views

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

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

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

Optimal angle for a projectile part 2 - Hangtime More free lessons at: http://www.khanacademy.org/video?v=XtAB9
882 views

Horizontal distance as a function of angle (and speed) More free lessons at: http://www.khanacademy.org/video?v=-h_x8
691 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=1WOrg
782 views

How the normal force changes when an elevator accelerates More free lessons at: http://www.khanacademy.org/video?v=hoRsH
753 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=TC23w
674 views

Figuring out the acceleration of ice down a plane made of ice More free lessons at: http://www.khanacademy.org/video?v=Mz2nD
701 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=v8ODI
779 views

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

Calculating the coefficient of kinetic friction (correction made in next video) More free lessons at: http://www.khanacademy.org/video?v=iA7Th
673 views

Why static friction is harder to overcome than kinetic friction More free lessons at: http://www.khanacademy.org/video?v=J9BWN
694 views

Thinking about the coefficients of static and kinetic friction More free lessons at: http://www.khanacademy.org/video?v=ZA_D4
792 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=_UrfH
695 views

A slightly more difficult tension problem. More free lessons at: http://www.khanacademy.org/video?v=zwDJ1
651 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 f ...
622 views

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

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

An example of conservation of momentum in two dimensions. More free lessons at: http://www.khanacademy.org/video?v=CFygK
729 views

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

Introduction to work and energy More free lessons at: http://www.khanacademy.org/video?v=2WS1s
671 views

More on work. Introduction to Kinetic and Potential Energies. More free lessons at: http://www.khanacademy.org/video?v=3mier
680 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_4L
798 views

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

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

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

Introduction to pulleys and wedges More free lessons at: http://www.khanacademy.org/video?v=vSsK7
600 views

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

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

Introduction to moments More free lessons at: http://www.khanacademy.org/video?v=ESusD
565 views

2 more moment problems. More free lessons at: http://www.khanacademy.org/video?v=peXbz
585 views

Expressing a vector as the scaled sum of unit vectors More free lessons at: http://www.khanacademy.org/video?v=FaF3v
671 views

More on unit vector notation. Showing that adding the x and y components of two vectors is equivalent to adding the vectors visually using the head-to-tail method More free lessons at: http://www.kh ...
639 views

Solving the second part to the projectile motion problem (with wind gust) using ordered set vector notation More free lessons at: http://www.khanacademy.org/video?v=jl_gQ
645 views

The direction of the force in cases of circular motion at constant speeds More free lessons at: http://www.khanacademy.org/video?v=vZOk8
679 views

Visual understanding of how centripetal acceleration relates to velocity and radius More free lessons at: http://www.khanacademy.org/video?v=NH1_s
670 views

How angular velocity relates to speed More free lessons at: http://www.khanacademy.org/video?v=zAx61
760 views

Proving that a = v^2/r More free lessons at: http://www.khanacademy.org/video?v=XjCEu
690 views

Asks students to find the minimum speed necessary to complete the loop de loop More free lessons at: http://www.khanacademy.org/video?v=wjZb3
719 views

Figuring out the minimum speed at the top of the loop de loop to stay on the track More free lessons at: http://www.khanacademy.org/video?v=4SQDy
740 views

Figuring out the car's average speed while completing the loop de loop More free lessons at: http://www.khanacademy.org/video?v=zcnnZ
615 views

What is the acceleration due to gravity at the space station More free lessons at: http://www.khanacademy.org/video?v=R5CRZ
712 views

Speed necessary for the space station to stay in orbit More free lessons at: http://www.khanacademy.org/video?v=9BNkm
630 views

Angular momentum is constant when there is no net torque. More free lessons at: http://www.khanacademy.org/video?v=s_R8d
743 views

A little bit on gravity More free lessons at: http://www.khanacademy.org/video?v=391tx
716 views

A little bit more on gravity More free lessons at: http://www.khanacademy.org/video?v=8i0j3
606 views

Introduction to Hooke's Law More free lessons at: http://www.khanacademy.org/video?v=ZzwuH
634 views

Work needed to compress a spring is the same thing as the potential energy stored in the compressed spring. More free lessons at: http://www.khanacademy.org/video?v=eVl5z
699 views

A spring, a frozen loop-d-loop and more! (See if you can find the mistake I made and get the right answer!) More free lessons at: http://www.khanacademy.org/video?v=P3QV9
663 views

Intuition behind the motion of a mass on a spring (some calculus near the end). More free lessons at: http://www.khanacademy.org/video?v=Nk2q-
620 views

We test whether Acos(wt) can describe the motion of the mass on a spring by substituting into the differential equation F=-kx More free lessons at: http://www.khanacademy.org/video?v=xoUpp
586 views

Figuring out the period, frequency, and amplitude of the harmonic motion of a mass attached to a spring. More free lessons at: http://www.khanacademy.org/video?v=oqBHB
604 views

What a fluid is. Difference between liquids and gasses (both fluids). More free lessons at: http://www.khanacademy.org/video?v=Pn5YE
770 views

Pressure and Pascal's Principal. More free lessons at: http://www.khanacademy.org/video?v=lWDtF
702 views

Pressure in a fluid at depth More free lessons at: http://www.khanacademy.org/video?v=5EWjl
683 views

Using our understanding of fluid pressure to figure out the height of a column of mercury. More free lessons at: http://www.khanacademy.org/video?v=i6gz9
620 views

Introduction to Archimedes' principle and buoyant force. More free lessons at: http://www.khanacademy.org/video?v=vzID7
657 views

A couple of problems involving Archimedes' principle and buoyant forces. More free lessons at: http://www.khanacademy.org/video?v=wwjtu
627 views

Introduction to the study of moving fluids. More free lessons at: http://www.khanacademy.org/video?v=G4CgO
611 views

Beginning of the proof of Bernoulli's Equation. More free lessons at: http://www.khanacademy.org/video?v=uqyLO
778 views

Second part of the Bernoulli's Equation proof. Beginning of a problem that uses the equation. More free lessons at: http://www.khanacademy.org/video?v=QX2YL
590 views

Second part of the example that uses Bernoulli's equation. More free lessons at: http://www.khanacademy.org/video?v=NGpJP
567 views

Clarification of the problem in part 10 More free lessons at: http://www.khanacademy.org/video?v=HnfBF
633 views

Complete example of a Bernoulli's Equation exercise. More free lessons at: http://www.khanacademy.org/video?v=xlJYY
614 views

Intuition of how gases generate pressure in a container and why pressure x volume is proportional to the combined kinetic energy of the molecules in the volume. More free lessons at: http://www.khana ...
675 views

Example problem that pv=pv. Introduction to temperature. More free lessons at: http://www.khanacademy.org/video?v=x34OT
776 views

Introduction to Kelvin. Example of a problem involving the ideal gas law More free lessons at: http://www.khanacademy.org/video?v=HvYUK
632 views

Introduction to the concept of a mole. Universal gas constant R. PV=nRT More free lessons at: http://www.khanacademy.org/video?v=5B1i2
615 views
 

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