m2 statics

you have to use both moments and newtons 1st law.

1st?! You mean 3rd right?

no, 1st. i.e. all the forces will be balanced if there is an equilibrium

you have to use both moments and newtons 1st law.

god! this is so confusing!
P135 M2 Edexcel

6 A uniform rod AB of length 4m and mass 4 kg is freely hinged at A to a vertical wall. A force P is applied at B at right anles to the rod in order to keep the rod in equilibirum at an angle of 30 degrees to the horizontal, as shown

Find a) the magnitude of P
b) the magnitude of R, the reaction of the hinge.


hm i think ive done the first bit right;
a) taking moments about A
2(4g)(cos 30) = 4P
P = 17.0 N which is what thye get

but then b) is a total mindfuck.

thanks for any help