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centre of mass

Q3 - The answer in the book is 8.31cm?
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Reply 1
Avatar for joostan
joostan
13
May be a little rusty, but I agree with your value, provided the densities of the two shapes are the same.
Reply 2
Avatar for nerak99
nerak99
13
I worked through your working and got the same.
Reply 3
Avatar for TSR George
TSR George
OP
17
Original post by joostan
May be a little rusty, but I agree with your value, provided the densities of the two shapes are the same.


Original post by nerak99
I worked through your working and got the same.


Thank you both :smile: I'll change the answer in the book
Reply 4
Avatar for TSR George
TSR George
OP
17
Please could you help with this one too (part b)? I got a different answer to the book again :/
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Reply 5
Avatar for joostan
joostan
13
What was the answer the book gave?
Reply 6
Avatar for TSR George
TSR George
OP
17
Original post by joostan
What was the answer the book gave?


19.7*
Reply 7
Avatar for nerak99
nerak99
13
I get 20.85 from tan⁡−10.41.05\tan^{-1} \frac{0.4}{1.05}
(edited 8 years ago)
Reply 8
Avatar for joostan
joostan
13
Hmm, I wondered if the two answers were somehow equivalent or they were using CD as the vertical for some reason - it would seem not.
Again I agree with you.
Reply 9
Avatar for TSR George
TSR George
OP
17
Original post by joostan
Hmm, I wondered if the two answers were somehow equivalent or they were using CD as the vertical for some reason - it would seem not.
Again I agree with you.


Thank you! I'm getting different answers on quite a few of these, so I'm really grateful for your help!!
Original post by nerak99
I get 20.85 from tan⁡−10.41.05\tan^{-1} \frac{0.4}{1.05}


That's what I had too!!

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