Читать книгу Physics I For Dummies - Steven Holzner - Страница 48

You can find the direction of an object’s movement from the values of and . Because these are just the legs of a right triangle, you can use basic trigonometry to find the angle of the ball’s displacement from the x-axis. The tangent of this angle is simply given by

Therefore, the angle itself is just the inverse tangent of that:

The ball (refer to Figure 3-2) has moved at an angle of 37° from the x-axis.