physics
posted by melissa .
a 1.5kg object moves up the yaxis at a constant speed. When it reaches the origin,the forces F1 =5.0 N at 37 deg above the the + xaxis, F2 = 2.5 N in the +xdirection, F3 = 3.5 N at 45 deg below the xaxis, and F4 = 1.5 N in the y direction are applied to it(a) Will the object continue to move along the yaxis? (b) If not, what simultaneously applied force will keep it moving along the yaxis at a constant speed?

(a) Add up the four forces as vectors and see if there is an net x component in the resultant vector. If there is, the motion will deviate from the y axis.
(b) The answer is called the "equilibrant" and is equal to the negative of the resultant vector you got in (a). It has the same magnitude as the resultant but s in the opposite direction.
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