Use centre of gravity
So at top : mgh = 500 x (0.8 + 0.3)
At bottom : mgh = 500 x 0.2
So the answer is 450N
Thanks!
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Use centre of gravity
So at top : mgh = 500 x (0.8 + 0.3)
At bottom : mgh = 500 x 0.2
So the answer is 450N
B?
it just says phase difference = 0 not why
B
According to me max speed should be half sphere end horizontal at either left or right. Think of it as an shm max kinetic energy is always at equilibrium position.View attachment 57183
(c) On Fig.4.1, mark a position of the pivot P for the piston to have
(i) maximum speed (mark this position S), [1]
(ii) maximum acceleration (mark this position A).
Why not use power10.If i have a value of 6453 and uncertainty of 5%
how should I write the final answer?
6400+_ 300?
I got this as 5% of 6453 is 322.65, to 1 s.f is 300
then i got 6400 as in to the same "tens" like thats 3 hundred, so the value should be to the hundreds and is 6400
bc in ones with decimal if the uncertainty is 0.4 we write the value to 1 dp
is this correct?
uncertainty is given to 1 s.f onlyWhy not use power10.
(6.45+- 0.323)*10^3
Or to 2sf both as you seem fit
uncertainty is given to 1 s.f only
http://papers.xtremepapers.com/CIE/...A and AS Level/Physics (9702)/9702_w09_er.pdfThat's so wrong! Who told you that? Don't do that mistake in exams they will penalize you for this.
You never came across an uncertainty with +- 0.25 or +-1.5 in any question paper? You must keep working more papers then.
These are 2s.f btw
More info here http://facultyfiles.deanza.edu/gems/lunaeduardo/UncertaintyandSignificantFig.pdf
Strange. Either my physics teacher was in the wrong or years have changed and so did answers? I need to confirm this with more teachers and friends , could you provide me the question for the "attached" screenshot?
Its June 2014 (Doesnt get any more recent than that) V22 Q2biiStrange. Either my physics teacher was in the wrong or years have changed and so did answers? I need to confirm this with more teachers and friends , could you provide me the question for the "attached" screenshot?
Also thanks for the info really didnt know about this throughout 2years I've been using 2sf
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