Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Physics Ch 3 Rvw
Physics Chapter 3 Review
| Question | Answer |
|---|---|
| Average Acceleration | the change in average velocity divided by time |
| Average Speed | the ratio of the total distance traveled to the time interval |
| Average velocity | the ratio of the change of position to the time interval during which that change occurred |
| Coordinate System | a system used to describe motion that indicates where the zero point of the variable being studied is located and the direction in which the values of the variable increase |
| Displacement | the vector of quantity that defines the distance and direction between two positions |
| Distance | a scalar quantity that is the length, or size, of the displacement vector |
| Instantaneous Velocity | the speed and direction of an object at a particular instant in time |
| Motion Diagram | a tool for the study of motion that uses a series of images to show the postion |
| Operational Definition | defines a concept in terms of the procedure or operation used |
| Origin | the point in a coordinate system at which the variables have a zero value |
| Particle Model | simplified version of a motion diagram in which the object in motion is replaced by a series of single points |
| Position Vector | the arrow on a motion diagram that is drawn from the origin to the moving object |
| Scalar Quantity | a quantity that only has magnitude |
| Time Interval | difference in time between two clock readings |
| Vector Quantity | a quantity that has both magnitude and a direction. |
| Compare/contrast scalar quantities and vector quantities | Scalar quantities have only magnitude, and vector quantities have magnitude and direction |
| Compare/contrast distance and displacement | Distance (scalar) is the length or size of the displacement; Displacement (vector) defines the distance and direction between two positions |
| Compare/contrast average velocity and instantaneous velocity | Average velocity is an objects total speed and time and instantaneous velocity is found at a specific instant in time. |
| When can a football player be treated as a point particle? | 1. Size of the object must be less than the distance, 2. Ignore internal motion (i.e. moving legs or waving arms) |
| Why is the coordinate system important in terms of velocity and acceleration? | It determines your sign by indicating where the zero point of the variable is located and the direction in which the values of the variables increase. |
| What is the equation of speed and what is its quantity? | Distance divided by time (scalar) |
| What is the equation of velocity and what is its quantity? | Displacement divided by time (vector) |
| what is the equation of acceleration? | velocity divided by time |
| Why is it important to make a table of given info and the unknown quantity and to assign a symbol for each? | Making a table better organize your info in order to make an equation. Making/using symbols allows you to find what is being identified and helps you record your information more efficiently. |
| What is the difference between average velocity and average speed?/ | Average velocity is a vector quantity and average speed is a scalar quantity. Velocity is found by the displacement divided by time and speed is found by the distance divided by time. |
| How are velocity and acceleration related? | Both velocity and acceleration both depend on the coordinate system to determine their sign; when one changes the other does as well. Acceleration is velocity over time. You must have velocity to have acceleration |
| Does a car that is slowing down always have a negative acceleration? | No; if the origin is placed specifically then the car could still have a positive acceleration. |
| Average velocity can be calculated by dividing displacement by what? | Time |
| Discuss the properties of speed | Scalar quantity, has magnitude |
| Discuss the properties of velocity | Vector quantity, has magnitude and direction |
| How can a car drive 500 miles and have only a few feet of displacement? | The drivers displacement is dependent on where they start and where they end, not the miles they traveled in between. |
| Is it accurate to say that all distances require a reference point? why? | No; to find distance, you must know how far the object has traveled. |
| Is it accurate to say that all displacement measures require a reference point? why? | Yes; to find displacement, your reference (starting) point is subtracted from your ending point. |
| Is displacement a magnitude or vector quantity? | Vector; because displacement determines size and direction. |
| Amy says she jogged 4.7 miles, is this a distance or a displacement? | Distance, does not give a direction |
| Can displacement be negative? How? | Yes; depending on the origin and the direction the object is going |
| True or false: an object can be moving for 10 seconds and still have zero displacement? How? | True; if an object went in a complete circle for 10 seconds and ended in the same place it started, the object would have a displacement. |
Created by:
itscourtneym