Conceptual Questions

1. If a force is perpendicular to displacement, does it do work? Explain why.
2. Compare the work done by gravity when lifting an object vertically versus along an inclined plane.
3. Explain why kinetic energy depends on the square of speed.
4. How does friction affect work and energy transfer?
5. Distinguish between positive and negative work with examples.
6. Why can an object have zero net work done yet still experience forces?
7. Explain the energy transformations in a roller coaster ride.
8. How does power relate to work and time? Provide a practical example.
9. Why is work a scalar quantity while force and displacement are vectors?
10. Describe situations where mechanical energy is not conserved and why.