A force of magnitude 30 N acts due east at a point OOO. A second force of magnitude 40 N acts due north at OOO.
Find the magnitude and bearing of the resultant force.
A third force acts at O O\,O so that the three forces are in equilibrium. Find the magnitude and bearing of the third force.
Instead, suppose that only the original two forces act on a particle of mass 10 kg. Find the magnitude of its acceleration.