Chapter 10, 11
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12 terms
Terms | Definitions |
|---|---|
 Rotation | when an object turns or spins about an internal axis |
| Axis | A straight line about which a rotation takes place |
| Revolution | a. Orbital motion about an external axis b. A turning or rotational motion about an external axis. |
| Linear Speed | distanced moved per unit time |
| Tangential Speed | The speed of an object moving along a circular path |
| Rotational Speed | the number of of rotations per unit time; often measured in rotations per minute or RPM |
| Centripetal Force | A center directed force that causes an object to move in a curved or circular path |
| Centrifugal Force | An apparent outward force on a rotating or revolving body. It is fictitious in the sense that it is not part of an interaction but due to the tendency of a moving body to move in a straight-line path(inertia). |
| Center of Mass | The point at the center of an object's mass distribution, where all its mass can be considered to be concentrated. same as the center of gravity |
| Center of Gravity | The point at the center of an object's mass distribution, where all its mass can be considered to be concentrated.Where the force of gravity can be considered to act.CG |
| Torque | The product of force and lever arm (measured in Newton-meters N-m). Torque produces rotational acceleration |
| Lever arm | The perpendicular distance between an axis and the line of action of a force that tends to produces rotation about that axis |
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