Finding the magnitude of a net force

[elkosp16]

2 problems both with dealing with finding the magnitude of a net force.

1. A gust of wind blows an apple from a tree. As the apple falls, the gravitational force on the apple is 2.25 N downward, and the force of the wind on the apple is 1.05 N to the right. Find the magnitude and direction of the net force on the apple.

2. The wind exerts a force of 452 N north on a sailboat, while the water exerts a force of 325 N west on the sailboat. Find the magnitude and direction of the net force on the sailboat.


I found the direction already.
tan theta = x/y

1. 1.05/2.25 tan-1 = 25 degrees

2. 325/452 tan-1 = 35.7 degrees

So how do you find magnitude?

 

[elkosp16]

never mind. i figured it out. you have to use Pythagorean theorem.