Physics 4.7.4b - Friction Practice Problems 3 - 4

Two practice problems dealing with friction.

[janieli]

Dear Derek,


Thank you so much for your help! I am currently a Grade 11 student who is taking Physics online as I didn't have enough room to take the course in my normal school semester. I've been struggling a lot to understand the concepts thoroughly for physics however with your help and The Organic Chem Teacher (another physics teacher on youtube), I've been managing through the online course haha. I really do hope that I'll make it through this course and hopefully can take Physics 12 in day school! Anyways, thank you once again for putting out resources online, that are free and accessible to those in need- me!


Cheers, Janie!

[SilverthorneA]

How fast was the car "mooo-ving"?? haha

[thrownover]

LOL!! "I thought the cow could be remembered with a physics problem."

[TylertheAD]

Perhaps you could work an example with two blocks with diff given masses connected by a cable. The blocks are pulled by another cable horizontally across a table with a given force. the blocks have the same cof of friction also given. Find the acceleration and Tension. Your videos have been very helpful to me so far. If you could clear this problem up for me also it would be much appreciated thanks.

[lazsa]

Define the positive and the negative direction and solve the question with the proper signs

[yehiahisham]

really like your way of solving and explaining. i want to know why didn't why plunged in Big F in the net force . since the Newton law says that anything accelerates then it has force? and thanks

[derekowens]

Well, that might vary from one textbook to another, and from one workbook to another, but in my course it is in chapter 2.

[esmann]

N = MG or N = F depending if it is horizontal or vertical. but do you or can you make a video explaining how to find force to stop a book from sliding down a vertical slope? thanks. would be interesting. i think i learnt it but i forgot. or if you already made a video, just send me a link please. thanks.

[andreaMJ]

what chapter is the formula v^2 = (v0)^2 + 2a delta x under? this is found in problems 1, 2 and 3.

[artahighmore]

At 8:34 you forgot the negative sign the g is negative the anwser shoud also be negative cause it's toward the left of x_axis .was i right?😂

[yehiahisham]

did u considered it as internal not external force.

[Dajavoutube]

Does anyone happen to know the name of the hardware Derek uses to produce his tutorials?