9.No misunderstanding. I've learned what that request actually means, and I don't want to be joined to another object by an inclined plane wrapped helically around an axis.
10.Like inclined planes, pulleys are used to gain a mechanical advantage: objects are easier to lift using a pulley system than by using your own two hands.
12.Helpful when you're trying to lift heavy objects, the inclined plane offers a mechanical advantage: the force required to move an object up the incline is less than the weight being lifted.
13.Although Galileo did experiment with balls rolling down inclined planes, most historians now agree that the Tower of Pisa experiment was a thought experiment rather than a physical one.