Mathematics, 08.05.2021 15:20 babytea

Two forces, (4i – 5j) N and (pi + qj) N, act on a particle P of mass m kg. The resultant of the two forces is R. Given that R acts in a direction which is parallel to the vector (i – 2j), (a) Find the angle between R and the vector j.
(b) Showthat2p+q+3=0.
Given also that q = 1 and that P moves with an acceleration of magnitude 8√5 ms-2;
(c) Find the value of m.
Can anyone please give me ..

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