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Hi. This is just a small query. The question asks to find the speed in part a so I use v=wr (w is omega). However we aren't given the radius and the mark scheme uses the length instead. Why? I thought r=Lsin○ (if ○ is the angle at the top) ?
Also part b uses N2L but it puts T=mrw^2 and doesn't resolve it to Tsin○=mrw^2 like usual. Why?
If what I asked doesn't make sense please do say.
Thanks for your help
(i uploaded a picture of the question and the answer)
Posted from TSR Mobile
Also part b uses N2L but it puts T=mrw^2 and doesn't resolve it to Tsin○=mrw^2 like usual. Why?
If what I asked doesn't make sense please do say.
Thanks for your help
(i uploaded a picture of the question and the answer)
Posted from TSR Mobile
(edited 9 years ago)
Original post by casparianStrip
...
Read the question again, carefully - it's not a conical pendulum.
Haha oh wow I feel kinda stupid now! But thank you! That really cleared it up for me.
Posted from TSR Mobile
Posted from TSR Mobile
Original post by casparianStrip
Haha oh wow I feel kinda stupid now! But thank you! That really cleared it up for me.
Posted from TSR Mobile
Posted from TSR Mobile
np. Everyone does it - just don't do it in the exams.
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