Uniform circular motion problem

In summary: I misread and thought we were finding the force from the seat on the officer. But that is not the force I'm talking about. I said in the other (upwards) direction. Are there any forces in that direction? (The direction out of the page in your diagram.)
  • #36
J-dizzal said:
i really need to work on recognizing what is the logical next step to take with what information i have. i spend way too much time on a single problem
It comes with practice. I hope at least that you feel you are getting better and better (even if slowly).

J-dizzal said:
did you find the angle with the arccos method? what values did you use for a and b? i could only get 180degs
I didn't use that method, but it would work. You had the dot product right [itex](62\hat i-mg\hat j)\cdot(0\hat i+\hat j)=-mg[/itex] but then you are supposed to divide by [itex]\sqrt{(mg)^2+62^2}*1[/itex] but for some reason you were dividing by mg. That's why in post #30 I said the magnitude of the net force is not mg.

I think it was just a careless mistake, just got to take things slow.
 
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  • #37
Nathanael said:
It comes with practice. I hope at least that you feel you are getting better and better (even if slowly).I didn't use that method, but it would work. You had the dot product right [itex](62\hat i-mg\hat j)\cdot(0\hat i+\hat j)=-mg[/itex] but then you are supposed to divide by [itex]\sqrt{(mg)^2+62^2}*1[/itex] but for some reason you were dividing by mg. That's why in post #30 I said the magnitude of the net force is not mg.

I think it was just a careless mistake, just got to take things slow.
yep i sure did miss that, thanks for point it out to me though.
 
  • #38
ill be on tomorrow with some statics problems, most likely. hope youre on to help. goodnight. thanks again.
 
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