What is the net external force acting on an apple as it falls to the groune with a force of 9.32 N and experiences a horizontal wind force of 1.51 N.
Taking downward to be negative and to the right being positive.
The two vectors given represent the legs of a right triangle. The net force will be the hypotenuse of the triangle. The magnitude can be determined by the Pythagorian Theorem and the angle from the inv. Tangent
Fnet = sqrt(1.51^2 + 9.32^2)N = 9.44 N
theta = invTan(-9.32/1.51) = -80.8 degrees.
Fnet = 9.44N at 80.8 degrees below the horizon.