The Student Room Group

M1 Moments

Scroll to see replies

Original post by thefatone
so when Rp=0 does that mean that when i take moments about A i ignore Rp since it's 0 and use 8mgx+30mgd=14mg


Original post by Zacken
Yes, but it's not =14mg, you forgot to multiply by the distance of Q from A.


And that error would lose all of the marks for the equation, since it is dimensionally incorrect.
Reply 41
Original post by Zacken
Yes, but it's not =14mg, you forgot to multiply by the distance of Q from A.


oh of course, seems like i'm forgetting everything today since it's friday
Reply 42
Original post by tiny hobbit
And that error would lose all of the marks for the equation, since it is dimensionally incorrect.


Ouch. But yeah, checking if the dimensions is correct is a good way to sanity check your answers, I found.
Reply 43
Original post by tiny hobbit
And that error would lose all of the marks for the equation, since it is dimensionally incorrect.


Original post by Zacken
Ouch. But yeah, checking if the dimensions is correct is a good way to sanity check your answers, I found.


i got 3.25d metres is that wrong?
Reply 44
Original post by thefatone
i got 3.25d metres is that wrong?


Uh, yeah I think I get the same.
Reply 45
Original post by Zacken
Uh, yeah I think I get the same.


Thanks so much
Reply 46
Original post by thefatone
Thanks so much


No problem.

Quick Reply

Latest