A-Level Edexcel Mechanics M1 June 2010 Q4 : ExamSolutions

[xDaveJaVu]

The beam remains horizontal and in equilibrium and the magnitude of
the reaction at D is three times the magnitude of the reaction at C.

[immortalxedger]

ExamSolutions What about the g that is 9.8 which acts downwards . Why didn't you take g into consideration of Weights of the particles ?

[ashleigh]

When you look at Jan 2009 Question 4. it says: Q is twice the magnitude of the normal reaction than R so we use 2Q = R
But in June 2009 Question 7d it says Q is three times the tension in the rope attached at P, we use Q = 3P
So i'm really confused!
Q = 3P

[marleyJJJ]

Will you get the same answer via working out the moments around the pivots as opposed to point B?

[MrRealtalkz]

why is the reaction at D 3R shouldn't the reaction at C be 3R?

[moshibenaim]

I got x to be 16/15. You said that it's 200 X 3 but shouldn't it be 200 X 4 as it's 4m away from B?

[JohnSmith-ojjp]

At 5:15, if I decided to take moments about the support D, what would the equation be? How would I express Tom and Sophie's distance from the support?