If we create a right triangle with the given scenario, the diagonal of the right triangle represents the 700N force the boy pulls on the mower's handle, and the 55-degree angle is the angle of elevation between the horizontal and the diagonal. If we let "x" represent the horizontal component of the pull, and "y" represent the vertical component of the pull, then we can use basic trigonometry to identify these components:
Horizontal: Cos(55) = x/700 --> x = 700*cos(55) = 401.5 N
Vertical: Sin(55) = y/700 --> y = 700*sin(55) = 573.4 N