Across
- 3. the speed AND direction an object is moving
- 5. the curved motion of a thrown object resulting from its initial forward velocity and the downward vertical force of gravity
- 6. This friction opposes the direction of motion of an object as it slides over a surface
- 7. rope that fits into a groove in a wheel
- 8. movement
- 10. and axle—two disks or cylinders, each one with a different radius, that rotate together as a unit
- 11. from change in speed AND/OR direction
- 12. This friction opposes the motion of an object through a fluid (liquids and gases) (example: air resistance)
- 13. the amount of matter in an object
- 14. the tendency of an object to resist a change in its motion
- 16. rigid bar that is free to move around a fixed point called the fulcrum
- 23. fluid friction acting on an object moving through the air; increases with speed; increases if surface area of moving object increases
- 25. the force of gravity acting on an object
- 26. a force that opposes the motion of objects that touch as they move past each other
- 27. the stored energy of an object
Down
- 1. the rate at which velocity changes
- 2. the product of an object’s mass and its velocity
- 4. a slanted surface along which a force moves an object to a different elevation
- 9. two or more simple machines that operate together
- 11. This friction acts on rolling objects and is significantly lower than other types of friction
- 15. V-shaped object whose sides are two inclined planes sloped toward each other
- 17. inclined plane wrapped around a cylinder
- 18. This friction acts on objects that are not moving (example: keeps shoe from sliding when you take a step)
- 19. an attracting force that acts between any two masses
- 20. the energy of a moving object
- 21. ability to do work
- 22. the overall force acting on an object after all the forces are combined
- 24. a push or pull that acts on an object; measured in newtons (N)