the two vectors and in Fig. 3-28 have equal magnitudes of 10.0 m and the angles are 30° and 105°. Find the (a) x and (b) y components of their vector sum r , (c) the magnitude of r , and (d) the angle r makes with the positive direction of the x axis.

b.

explanation:

the force on the thing and the distance the force moves the thing

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it