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Acceleration khan academy Videos

Ice Accelerating Down an Incline

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

User Comments

Tola Oladunjoye commented on 06 Nov 2014

Why can't you be my Physics teacher Khan?

Bjoern OfSweden commented on 28 Jul 2015

+Tola Oladunjoye Why can't you be his student?

Centripetal Acceleration (part 3)

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

User Comments

funnydayz commented on 17 Nov 2014

Where did he get the 32 from??

Jackie Rosenthal commented on 19 Nov 2014

That would be acceleration due to gravity in ft per second I believe...didn't actually calculate, but that would be the only logical thing.

Acceleration of Aircraft Carrier Takeoff

Using what we know about takeoff velocity and runway length to determine acceleration More free lessons at: ...

User Comments

usf slm commented on 26 Feb 2015

to change from km/h to m/s you can multiply 260(5/18)=72.2

usf slm commented on 26 Feb 2015

72x18/5 will go back to km/h

Newton's 2nd Law of Motion

Thinking about how force relates to velocity and acceleration.

User Comments

rhoadess commented on 18 Jul 2012

One good way to know if one's equation is correct is to use Dimensional analysis, but correct dimensions doesn't guarantee a corresponding relationship with reality. Force=M*L / T^2; |Velocity| = L / T; Acceleration = L / T^2; such that L = length, M = mass, T = time. So F/M = L / T^2 = Acceleration, thus Force divided by mass gives us an acceleration, a change of velocity in time. If you had the ability to change your Higgs particle density you could really change the truck's velocity.

Sebastian Eriksson commented on 18 Jul 2012

Inertia is resistance to change, it's not equal to mass. For this example it's correct to say that mass is the inertia but think of an ice skater spinning; They can increase their rotational speed by keeping their hands close to their body. The mass is the same as when their hands were far from the body but they speed up because their inertia decreased.

Frost commented on 18 Jul 2012

@CodePython @88roro11 @tahamr83 F=dp/dt P=/ mv P=γmv γ=1/sqrt(1-v^2/c^2) and d/dt(γmv)=γ^ma, F=ma is approximate correct at very low speed, but its not exact, thus a "lie" I'm sorry if I offended anyone below. if you don't believe me, ask khan if I'm wrong

Muhammad Taha commented on 18 Jul 2012

Ooh man you are accounting the relativistic effects ... i am sorry in this case you are right ... and i am sorry if I offended you .. you should have mentioned brother .. :-)