Newton's 2nd Law (12 of 21) Calculate Acceleration w/o Friction; Inclined Plane, Pulley, Two Masses

Рет қаралды 66,799

9 жыл бұрын

Shows how to calculate the acceleration and tension in the string for a two block system on an inclined plane without friction using Newton' Second Law. The acceleration of an object is directly proportional to the net force applied to the object and inversely proportional to the mass of the object. The second law can also be stated in terms of an object's changing momentum, such that the rate of change of momentum of an object is directly proportional to the net force applied and the change in momentum is in the direction of the net force.
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Пікірлер: 71

@heyitskaden 6 жыл бұрын

You are honestly the best tutor ever! I was very confused (I'm not the strongest in science) but this video just saved me! THANK YOU!

@jamesbranch7239 7 жыл бұрын

i studied physics years ago ( about 50 years to be more exact) and as i am now retired, i'm going over it again. Your explanations are helping me to remember and renew. Loads of thanks!!!!

@jzmommie 3 жыл бұрын

My son is currently failing physics, but finding you on YT has given us hope that learning this subject is very much possible. Thank you for all the good content!

@stepbystepscience 3 жыл бұрын

Best of luck! Great and thanks for letting me know and thanks for helping your son.

@bobbyoctaviano2661 7 жыл бұрын

Dear Doc Brian, I must tell you that I have created whole sections of my current physics notebooks, with "Doc Brian" dedicated material. I can't thank you enough for being so through and concise. I am a very specific student, and I need someone like you to help build the core of my confidence. Your tutelage has been invaluable. I cannot thank you enough for sharing your gift, and helping someone who always feels miles behind the rest of the pack. You are a God send Doc Brian. Bless you Sir, Bobby Octaviano 😃

@stepbystepscience 7 жыл бұрын

That is very very nice of you to take the time to write such a nice comment. I make the to help people who, like myself, benefit from step-by-step instruction. Again, thank you.

@birsendoner3662 7 жыл бұрын

Thank you so much for your time and clear explanations!

@nimo2211 7 жыл бұрын

I've been trying to understand physics this entire quarter. Up until I found your videos I'd get so frustrated at it but now I'm getting problems right! Your videos are so clear and helpful, THANK YOU!!

@peterfaherty3936 7 жыл бұрын

I procrastinated until 2:00 AM and this just saved my life

@stepbystepscience 7 жыл бұрын

Good things the internet is open 24/7. Thanks for the comment.

@yangyu2950 7 жыл бұрын

you legend. so helpful thank you

@RK-jb6rq 7 жыл бұрын

Thank you for the great explanation.... Helped A lot.... ☺

@layton591 8 жыл бұрын

Wonderful video. Despite having a problem similar to this but flipped I was still able to solve it due to the great explanation. Quick question though, why did you make gravity positive instead of negative? I could see why for m2 block but not for m1since you made right side of x axis positive.

@raedhaddad5604 3 жыл бұрын

Omg this is so incredible i thought that i would NERVER solve such question 💕💕

@stepbystepscience 3 жыл бұрын

So glad it was helpful! Thanks for the comment.

@qaziahmed9850 7 жыл бұрын

thanks for this videos its help for the students

@edvargas3105 6 ай бұрын

Great!! So clearly explained with a lot of details.

@stepbystepscience 6 ай бұрын

Glad you liked it and thanks for the comment

@zhijin0201 7 жыл бұрын

clear and simple explanation!!!! this is what i need

@stepbystepscience 7 жыл бұрын

Yes, I try to go over everything step by step, in fact you can see a listing of all my videos at www.stepbystepscience.com

@BakeEscape 6 жыл бұрын

thanks a bunch

@slaughterchris3657 4 жыл бұрын

Thanks man this really helped me understand this problem

@stepbystepscience 4 жыл бұрын

Great that it did and thanks for the comment

@leratoshasha1224 3 жыл бұрын

Thank you. How do you calculate mass ?

@thisisme5791 9 жыл бұрын

thank you.your video is really helpfull.in short but with lots of details,

@stepbystepscience 9 жыл бұрын

this is me sometimes it is hard to fit everything into 10 minutes of less. Thanks for the comment.

@walidbayat5653 7 жыл бұрын

well explained

@rachelwalker9555 6 жыл бұрын

why didn't you use the Y component of M1?????

@renevega2 7 жыл бұрын

awesome

@Taengudnight 5 жыл бұрын

Thank you so much!

@stepbystepscience 5 жыл бұрын

You are very welcome.

@TheHarsh529 7 жыл бұрын

You are a lifesaver

@hassanulger7167 7 жыл бұрын

I did all subbed, commented and liked

@stepbystepscience 7 жыл бұрын

Excellent, thanks. You can see a listing of all my videos at my website, www.stepbystepscience.com

@michelmanigat6322 2 жыл бұрын

Good explanation!

@stepbystepscience 2 жыл бұрын

Thanks, glad you think so!

@lukeschwall2895 7 жыл бұрын

I don't understand how he is getting 52.3 N as his final tension. m1gx (which is 4.23) + m1a (which is 10 times 1.09 = 10.9). 10.9 + 4.23 does not equal 52.3 N. Am I doing something wrong?

@homegirl44 7 жыл бұрын

I don't get it either and I hate how he doesn't explain it nor does anyone in the comments.

@andrewf7480 7 жыл бұрын

m1gx is =(10x9.8xsin(25))= 41.42, then add your m1a which = 10.9, so you get 52.3 N

@jemmaster4897 7 жыл бұрын

m1gx =m1g sin (theta)= (10x9.8 sin (25)=41.42 + 10.9 +52.3

@nicolaskano8585 7 жыл бұрын

Hi Doc, Love your video but just had a question. When you are finding the sum of the forces to divide it by the entire mass, why can you just subtract those two values? Don't they need to be in the same direction (x or y) to resolve them? Thanks

@stepbystepscience 7 жыл бұрын

I am not quite sure that I understand your question but....I subtracted one force from the other because they point in opposite directions, m2g is up the ramp and m1gx is down the ramp. Does that help?

@nicolaskano8585 7 жыл бұрын

somewhat, however m1 pointed slanted, not directly down as m2 is.

@thebear9369 8 жыл бұрын

great explanation

@stepbystepscience 8 жыл бұрын

great, thanks for the comment.

@14Keilinha 7 жыл бұрын

it might be a lame question but how did you decide to choose 45 degrees instead of another number like 40 or 50, I'm probably missing something so obvious but yes help!

@jamesbranch7239 7 жыл бұрын

His choice of 45 degrees was arbitrary, but he chose a value so that the acceleration was calculated as negative in order to show that it's possible under certain conditions that the weight slides in the other direction as when the angle was 25 degrees.

@Heytherekaye 8 жыл бұрын

Was the coefficient of friction given or was it zero because there is no friction between the object and the incline plane?

@stepbystepscience 8 жыл бұрын

+HeythereKaye In this case the coefficient of friction is zero. There is a link at the beginning of the video for a similar problem with friction or you can see a listing of all my videos from my website, www.stepbystepscience.com

@alkassel2793 6 жыл бұрын

I'm sorry but wouldnt you covert the weights of the blocks to newtons using Fg=m*g before putting them into the eqaution for the acceleration, because acceleration is the sum of the forces not the sum of the masses . You still get the same nswer either way it was just a bit confusing

@stepbystepscience 6 жыл бұрын

I think I did that, but there is of course more then one way to solve the problem.

@abdulazim7211 4 жыл бұрын

what will be result if the diagrum change as mirror view

@stepbystepscience 4 жыл бұрын

none?

@SaraGarcia-hc1yc 6 жыл бұрын

ur amazing !!!!!!!

@stepbystepscience 6 жыл бұрын

Sara Garcia Nice of you to say

@chesleygirlviolinmusic5629 5 жыл бұрын

m2 should be bigger than m1 to have acceleration otherwise Fx is bigger than Fg...

@trumpenhammerofkek4821 7 жыл бұрын

I wish my professor could explain anything half as well as you.

@slaughterchris3657 4 жыл бұрын

I know man my teacher for my ap class just expects us to know what is going on

@davidharra5864 7 жыл бұрын

At the very end solving for tension. On M1 I am not getting 52.3 N. 10 x 9.8+10 x 1.09 = 108.9 N.

@davidharra5864 7 жыл бұрын

Aw thank you very much. late nights doing work doesn't help. this video was amazing and very helpful. The kind if explanations that favour my way of learning 😀😀👌

@stepbystepscience 7 жыл бұрын

Great that you guys are helping each other out. You can see a listing of all my videos at my website www.stepbystepscience.com

@kia2065 6 жыл бұрын

is this vince vaughn?

@stepbystepscience 6 жыл бұрын

That's right! and still crashing weddings too!

@faridabasawad8800 8 жыл бұрын

what happened to the normal and the y component of the mass on the inclined plane?

@faridabasawad8800 8 жыл бұрын

+farida basawad or nvm i got it

@stepbystepscience 8 жыл бұрын

+farida basawad Great, You can see a listing of all my videos from my website at www.stepbystepscience.com

@iFrooss 7 жыл бұрын

Wait wat?!!! It should be the other way around the mass of m1 is bigger than m2

@iFrooss 7 жыл бұрын

Oh sorry so you can choose

@anitkithra 7 жыл бұрын

A Nice Comment :P

@stepbystepscience 7 жыл бұрын

I think it is supposed to be a "nice positve comment".....but all the same thanks for watching and commenting. You can see a listing of all my videos at www.stepbystepscience.com