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secondary 4 | A Maths
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Please help, tq :)
Date Posted: 5 years ago
Views: 238
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hope this helps.
Date Posted:
5 years ago
thank you, why do u reject the larger deter for the qns qns tho?
the larger angle would mean the rod AB rotates and crosses over the wire Oy.
doubt that can happen since B is ringed to wire Ox.
doubt that can happen since B is ringed to wire Ox.
Oh thank you for the clarification :) I have another qns tho, sorry if it’s bothersome, but abt the third qns when cos (deter -22.6) =0 therefore deter =22.6, but isnt cos(deter-22.6) suppsed to be equal to 1 when L is at its maximum? And if it’s equals to one, deter-22.6 should be equal to cos inverse 1 which equates to either 0 or 360 degrees, and I’m confused bc idk which one we’re suppsed to pick?
no worries, glad to help.
and oops! a typo error.
shld be:
cos(θ-22.6°) = 1
=> θ-22.6° = 0°
mathematically,
=> θ-22.6° = 0° or 360°
but again, rod AB cannot cross over Oy,
so if we choose => θ-22.6° = 360°,
θ = 382.6°,
this would mean rod AB crosses over wire Oy one round and back to angle 22.6°. (not happening)
and oops! a typo error.
shld be:
cos(θ-22.6°) = 1
=> θ-22.6° = 0°
mathematically,
=> θ-22.6° = 0° or 360°
but again, rod AB cannot cross over Oy,
so if we choose => θ-22.6° = 360°,
θ = 382.6°,
this would mean rod AB crosses over wire Oy one round and back to angle 22.6°. (not happening)
Ohh..thank you so much :))))!!
u r welcome!
dun forget to give upvote
dun forget to give upvote
Hahahahhaha okay
rem: everyone, and anyone, deserves a good pat on the back for a job well done
Lol..haha yea
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