Motion Maps, Position-Time, Work, and Power Flashcards
- Create a motion map that represents a car moving fairly fast at a leftwards constant speed
- Create a motion map that represents a car moving fairly slow at a rightwards constant speed
- x—————————————————————->
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↦ ↦ ↦ ↦ ↦ ↦ ↦ ↦ ↦
What is a motion map?
Motion maps represent position, velocity, and acceleration of an object
What symbolizes the origin in a motion map?
x
The spacing between velocity vectors in a motion map are equal if….
…velocity is constant
*NOTE: If the velocity vectors are spaced further apart, the faster the object is moving
- draw a diagram of a car speeding up to the right
2. draw a diagram of a car slowing down the right
- .. . . . . . . . . . . . car
- . . . . . . . . . . .. car
What is work?
Work is a force that acts upon an object over some amount of distance to cause a change in position of the object
Work is done on an object when…
…the object moves the same direction in which the force is exerted
What unit is work? What is this unit also known as?
The unit for work is newton*meter. This is also known as the joule (J).
How do you calculate work?
work= force*distance
What is power?
The rate at which work is done.
How do you calculate power?
power= work/time, which can also be written as force*distance/time
What unit is power? What is this unit also known as?
The unit for power is joules per second (J/s), which are also called watts (w)
What unit of watts is power often measured in?
kilowatts
*NOTE: 1 kilowatt=1,000 watts
What does the slope of a position time graph tell you?
The velocity
What does the area “under the velocity-time graph” tell you about the motion of the object?
distance or displacement
What is the position in a position time graph measured in? Time?
Position: meters (m)
Time: seconds (s)
Create a motion map of a person standing still
x—————————————————————>
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Create a motion map of a person walking towards the origin in a steady speed for 5 seconds, then stands still for 5 more seconds.
x—–1———-2———3———4———5——>
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