1. A girl jumping from a high platform into a pool tucks her body into a tight ball to complete two somersaults before extending her body as she enters the water. Her body rotates much more quickly during the somersaults than during her extension into the water. This is an example of what law?
2. Is the tangent to a circle always perpendicular to the radius?
3. Will inertia tend to keep a moving body following a curved path?
4. Explain the relationship between the number of teeth on two interlocking gears and their relative number of revolutions.
5. How does the presence of an idler gear affect the relationship between a driver gear and a driven gear in a gear train?