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Urgent M2 Help

I'm having huge trouble trying to understand the centre of masses and projectiles chapter for M2 (edexcel). i'm using the heinemann m2 book and i cant get any of the solved examples at all (only the really easy ones).
:eek:

if anyone can offer some help i really would appreciate it.
also i have this question about centre of masses in Jun 2001 that i cant get to answer (Question 2)

(If anyone has good thorough M2 notes (not quick revision notes) please please post them)

thank you

Reply 1

non-centrally acting

why dont you post the question? then someone might be able to help you :smile:

Reply 2

Syko_Chicken

Question 2 June 2001 M2 (EDEXCEL)
Figure shows a decoration which is made by cutting 2 circular discs from a sheet of uniform card.The discs are joined so that they touch at point D on the circumference of both discs.The discs are coplanar and have centres A and B with radii 10 and 20 cm respectively.
(a)Find the distance of the centre of mass of the decoration from B.

The point C lies on the circumference of the smaller disc and angle CAB is a right angle.The decoration lies is freely suspended from C and hangs in equilibrium.
(b)Find, in degrees to one decimal place, the angle between AB and the vertical.

(NOTE: answer in mark scheme is (a)6cm (b)22.6 deg