Hey guys,
Here is an M1 question involving both moments and vectors taken from a Solomon Paper..
I can't see an easy way of solving this question, but i had to use some C4 and some vector calculus... if you guys see an easy way please tell me
4. The force F
1 = (5i + 2j) N acts at the point A on a lamina where the position vector of A,
relative to a fixed origin O, is (3i – 2j) m.
(a) Calculate the magnitude and the sense of the moment of the force about O.
(4 marks)Another force F
2 = (pi + qj), acts at the point B with position vector (–i + 4j) m so that the
resultant moment of the two forces, F
1 and F
2, about O is zero.
Given also that the moment of F2 about A is 34 Nm in a clockwise sense,
(b) find the values of p and q.
(6 marks)