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Physics rotary quiz
physics rotary motion chapter 5.1 quiz
| Question | Answer |
|---|---|
| the motion of an object turning about an axis | what is rotary motion |
| circular motion is when the object as a whole goes in a circular path. rotary motion is when the axis is part of the motion of the object | what is the difference between circular and rotary motion |
| the object must spin about an axis at a constant rate | what must happen for rotary motion to be constant |
| if the rate of spin or the direction of the axis varies | when is it variable rotary motion |
| revolutions, degrees, radians | what are the 3 ways to measure angles |
| when placed with its vertex at the center of the circle cuts on the circumference and arc equal in length to the radius of the circle | an angle of 1 radian is the angle when |
| lowercase Greek letters | what do you use to represent rotary motion |
| the angle about the axis of rotation through which an object turns | what is angular displacement |
| the time rate of angular displacement | what is angular velocity |
| the time rate of change of velocity | what is angular acceleration |
| because they have magnitude and direction | why is angular displacement, angular velocity, and angular acceleration vector quantities |
| torque | a wheel won't spin unless what is applied |
| angular velocity | unless torque acts on a spinning wheel, the wheel will continue with constant what |
| first and second law | if torque replaces force, then what 2 laws of Newton's are applied to rotary motion |
| torque must be applied | how can you change the rate of rotation of an object about an axis |
| the mass of the rotating object, the distribution of the mass about the axis of rotation | what 2 things does angular acceleration depend on |
| rotate fast | how will the bar rotate if 2 masses are close to the bar |
| rotate slow | how will the bar rotate if 2 masses move out |
| the resistance of a rotating object to a change in its angular motion | what is rotational inertia |
| inversely related | what is the relationship between rotational inertia and angular acceleration |
| directly related | what is the relationship between torque and angular acceleration |
| Newton's Second law | in the torque formula, the rotary motion is a statement for what law |
| mass and the shape | what 2 things does rotational inertia take into account of a rotating object |
| radians | what unit should angular displacement be in |
Created by:
MollyM27
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