Physics Lesson: Centripetal Force Part 1 Acceleration Dynamics for High School

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[SaadFCB]

I really really appreciate your effort in uploading this lesson/lecture. Your explainations are always wonderful and so easy to understand :D

oh and I had a question if you dont mind , can you like please explain what exactly the force of friction does. I read your comment about the force of friction as a reaction force against the turning motion of the wheel , but how does it exactly help to keep in a circular motion? And what if the friction was too low ? the car wudnt travel in a circle?

[PhysicsEH]

@SaadFCB The important point is that tires create friction when you turn the wheel. This friction is toward the centre as you turn. It's also importnat to understand that any object moving in a circle has to have a force toward the center of that circle and the friction force therefor is the one that is providing the force to keep the car going in a circle. If the friction is too little than the car can not go in that circle but a larger one will work so the circle gets bigger. I hope this helps

[phuajiawei]

Why do you say when the tire turns,FF will be generated to the middle of the circle??

[PhysicsEH]

@phuajiawei In order for the car to turn, a force is required toward the middle of the circle. When the car wheels turn, they push against the road and the road reacts by pushing back. This force is the friction of the road and it is toward the middle of the circle. When the wheels are NOT turned, the car has no sideways force and does not turn. So turning the car wheel makes the friction force that can turn the car around the circle. I hope this helps.

[phuajiawei]

@PhysicsEH It doesn't help....IT HELPS ALOT!Thanks a ton ^.^!

[PhysicsEH]

@phuajiawei Thanks for the great comment.

[someone20ify]

@PhysicsEH You are the best teacher!!!.....i like ur voice and the way u teach!!!.....u r so awesome!!!

[iamiuts]

Clear, easy to follow and short. Yours are the ideal physics lessons! Thanks for sharing with us! :)

[SuperButtonmonkey]

I'm reviewing for my physics exam and I have to say, I've watched a lot of other physics videos (Khan Academy) That were very long, and didn't answer the questions I had about Centripetal Force, but it only took 80 seconds, and I remembered exactly what I needed to know, thank you for putting for much effort into what you do!

[hEll0xBeaUtiiFuL]

this is just... amazing. so clear. and covers everything. if only i had found these videos sooner lol. thank you so much!

[DarkBluePaint]

hehehehe I love how I understand all this. Freshman taking physics 'cause im a boss like that :)

[JulieNicoleSays]

i wish i took honors physical science instead. im sooo a chemistry person..

[stephen01taylor]

Weight, Fg, gravity, mg: they all represent the "downward" pull from the earth so any label is usually accepted

[l3uffles]

I have a question regarding the free body diagram. Wouldn't the force downwards actually be weight rather than gravity?

[aurisawei]

oops nvm. i'm thinking of centrifugal

[aurisawei]

wow. no. it's accelerating away from the center.