Podcast
Questions and Answers
What does the slope of a position versus time graph give?
What does the slope of a position versus time graph give?
velocity
What does the magnitude and direction refer to?
What does the magnitude and direction refer to?
vector
What are numbers without direction called?
What are numbers without direction called?
scalar
What is the rate at which an object changes called?
What is the rate at which an object changes called?
What does the slope of a distance vs time graph represent?
What does the slope of a distance vs time graph represent?
Where do you find 'how long' an object traveled on a Vel-Time Graph?
Where do you find 'how long' an object traveled on a Vel-Time Graph?
Where do you find 'how far' an object traveled on a Pos-Time Graph?
Where do you find 'how far' an object traveled on a Pos-Time Graph?
Where do you find 'how long' an object traveled on a Pos-Time Graph?
Where do you find 'how long' an object traveled on a Pos-Time Graph?
What do we know about objects that slow down?
What do we know about objects that slow down?
Where do you find 'how fast' an object traveled on a Vel-Time Graph?
Where do you find 'how fast' an object traveled on a Vel-Time Graph?
Where do you find 'how far' an object traveled on a Vel-Time Graph?
Where do you find 'how far' an object traveled on a Vel-Time Graph?
What do you know about objects that speed up?
What do you know about objects that speed up?
What does having a constant acceleration mean?
What does having a constant acceleration mean?
Where do you find 'how fast' an object changed its velocity on a Vel-Time Graph?
Where do you find 'how fast' an object changed its velocity on a Vel-Time Graph?
Where do you find 'how fast' an object traveled on a Pos-Time Graph?
Where do you find 'how fast' an object traveled on a Pos-Time Graph?
At the peak of its height, what happens to a ball thrown straight up?
At the peak of its height, what happens to a ball thrown straight up?
Compared to Object 1, how far does Object 2 fall if it falls freely for 8.0 seconds?
Compared to Object 1, how far does Object 2 fall if it falls freely for 8.0 seconds?
How far does a heavy ball fall during the 2nd second?
How far does a heavy ball fall during the 2nd second?
What happens to the velocity of a leftward moving vehicle that applies its brakes?
What happens to the velocity of a leftward moving vehicle that applies its brakes?
What is the velocity of a ball thrown vertically upward with an initial velocity of 20 m/s at t=5.0 seconds?
What is the velocity of a ball thrown vertically upward with an initial velocity of 20 m/s at t=5.0 seconds?
What must be true about an object moving with constant non-zero velocity?
What must be true about an object moving with constant non-zero velocity?
How can one find the coefficient of friction of an object on a flat surface?
How can one find the coefficient of friction of an object on a flat surface?
What can you say about a shopping cart that is full of groceries?
What can you say about a shopping cart that is full of groceries?
What expression best describes a child on her bicycle rolling to a stop?
What expression best describes a child on her bicycle rolling to a stop?
How are mass and weight related?
How are mass and weight related?
If an object moves from left to right with decreasing velocity, what can be said about the net force?
If an object moves from left to right with decreasing velocity, what can be said about the net force?
If the applied force on an object is increased by a factor of 4, how does that affect the acceleration?
If the applied force on an object is increased by a factor of 4, how does that affect the acceleration?
What force caused you to slide forward when a bus stops suddenly?
What force caused you to slide forward when a bus stops suddenly?
Flashcards
Position-Time Graph Slope
Position-Time Graph Slope
The slope of a position-time graph represents an object's velocity.
Velocity-Time Graph Area
Velocity-Time Graph Area
The area under a velocity-time graph represents the distance an object travels.
Velocity
Velocity
The rate at which an object changes its position.
Acceleration
Acceleration
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Constant Acceleration
Constant Acceleration
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Vector
Vector
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Scalar
Scalar
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Free Fall Distance
Free Fall Distance
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Force and Acceleration Relation
Force and Acceleration Relation
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Inertia
Inertia
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Stopping a vehicle
Stopping a vehicle
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Constant Velocity
Constant Velocity
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Mass and Weight
Mass and Weight
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Inertia Example
Inertia Example
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Coefficient of Friction
Coefficient of Friction
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Study Notes
Motion and Graphs
- The slope of a position versus time graph represents velocity.
- The slope of a distance versus time graph also indicates velocity.
- The x-axis of a velocity-time graph shows how long an object traveled.
- The y-axis of a position-time graph displays how far an object has traveled.
- The area under a velocity-time graph determines how far an object has traveled.
Vectors and Scalars
- Vectors have both magnitude and direction (e.g., position).
- Scalars are quantities without direction (e.g., temperature, distance).
Acceleration and Velocity
- Velocity is defined as the rate at which an object changes its position.
- Objects that slow down have a negative velocity with a positive acceleration, or a positive velocity with a negative acceleration.
- Objects that speed up have both velocity and acceleration either negative or positive.
- Constant acceleration means an object's speed is continually changing.
Falling Objects
- An object falls freely, traveling further as time increases; after 8.0 seconds, it falls four times as far as after 4.0 seconds.
- During the second second of free fall, a heavy ball dropped from a height falls 15 meters.
Forces and Motion
- A leftward-moving vehicle applying brakes experiences negative velocity with positive acceleration.
- An object moving with a constant non-zero velocity exerts a net force of zero.
Mass and Weight Relations
- Mass and weight are interconnected through the acceleration due to gravity.
- A heavier object, like a full shopping cart, is harder to stop due to its greater inertia.
Friction and Forces
- To calculate the coefficient of friction for an object on a flat surface, use the formula Ff/mg.
Miscellaneous Concepts
- A child slowing down on a bicycle is best described by the expression uFn.
- If the applied force on an object is quadrupled, its acceleration is also increased by a factor of four.
- Sliding forward in a bus that stops suddenly is due to inertia rather than an external force acting upon you.
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