Galileo discovered that the steeper the incline, the greater the ball's acceleration. When the plane is vertical, the acceleration is the same as if the object were falling freely.
Work Step by Step
This is discussed on pages 45-46.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.