Can i get help with my F=ma problems?

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    F=ma
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The discussion focuses on solving four physics problems related to Newton's second law, F=ma, particularly in the context of elevators and friction. Participants emphasize the importance of drawing free body diagrams to visualize forces and clarify the relationships between them. They discuss how to identify known values and apply equations to find unknowns, such as acceleration and friction forces. The conversation highlights the need for careful consideration of directionality in forces, especially in elevator scenarios where net forces determine acceleration. Overall, the collaborative effort leads to a better understanding of the physics concepts involved in the problems.
  • #51
115.73 Now is this when i plug into cos? cos(28)=115.73/x (with x=hypotinus)
 
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  • #52
You got it. Check your math. Good JOB
 
  • #53
Sick! i can't thank you enough. I would of got none of the equations right if it weren't for this. Website crashed again (probably because of all the kids doing homework last minute) but ill get it in as soon as it is up! thanks again and good night.
 
  • #54
Did you get number 2? It works like number 1 but don't forget to calculate the total mass and the total actual weight before you sum your forces.

Good luck
 
  • #55
Yah i got number 2. I was able to figure it out all by myself :D. Drawing things out makes it sooooo much easier.
 
  • #56
Tell me about it. I flunked my first physics courss (took it over and got an A though)
 
  • #57
i did the 70kg times the 20 (because it was the maxium occupancy). and then added the answer to that to 540kg to get the total down force. I converted it to Newtons then subtracted the up force (32471) from the down force. With that, I did F=Ma and got the answer. hopefully that made sense haha
 
  • #58
Drawing diagrams is a good rule of thumb in every physics course. I'm glad you got it all in the end.
 
  • #59
Yah and it helped that you guys both walked me through the steps rather then just doing it for me
 
  • #60
sounds good (sometimes two cooks make a better meal) hahaha
 

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