7 Questions
What does the slope of a distance-time graph represent?
Velocity
What is the rate of change of velocity?
Acceleration
What is retardation?
Negative acceleration
What is the acceleration of an object in uniform motion?
Zero
What is an example of non-uniform motion?
A car accelerating from rest
What does the slope of a velocity-time graph represent?
Acceleration
What is the characteristic of the acceleration of an object in non-uniform motion?
It is not constant
Study Notes
Graphical Representation
- A straight line motion can be represented graphically using a distance-time graph and a velocity-time graph.
- Distance-time graph:
- Slope of the graph represents velocity.
- Steeper slope indicates higher velocity.
- Velocity-time graph:
- Slope of the graph represents acceleration.
- Positive slope indicates acceleration, negative slope indicates deceleration.
Acceleration
- Acceleration is the rate of change of velocity.
- It is a vector quantity, measured in m/s².
- Acceleration can be positive (increasing velocity) or negative (decreasing velocity).
Retardation
- Retardation is the rate of decrease in velocity.
- It is a type of deceleration.
- Retardation is a negative acceleration.
Non-uniform Motion
- Non-uniform motion is when the velocity of an object changes with time.
- The acceleration of an object in non-uniform motion is not constant.
- Examples: a car accelerating from rest, a thrown ball.
Uniform Motion
- Uniform motion is when the velocity of an object remains constant.
- The acceleration of an object in uniform motion is zero.
- Examples: a car moving at a constant speed, a satellite in orbit.
Graphical Representation
- A distance-time graph and a velocity-time graph can be used to represent straight line motion graphically.
- The slope of a distance-time graph represents velocity, and a steeper slope indicates higher velocity.
- The slope of a velocity-time graph represents acceleration, with a positive slope indicating acceleration and a negative slope indicating deceleration.
Acceleration
- Acceleration is the rate of change of velocity and is a vector quantity measured in m/s².
- Acceleration can be positive (increasing velocity) or negative (decreasing velocity).
Retardation
- Retardation is the rate of decrease in velocity and is a type of deceleration.
- Retardation is a negative acceleration.
Motion
Non-uniform Motion
- Non-uniform motion occurs when the velocity of an object changes with time.
- The acceleration of an object in non-uniform motion is not constant.
- Examples of non-uniform motion include a car accelerating from rest and a thrown ball.
Uniform Motion
- Uniform motion occurs when the velocity of an object remains constant.
- The acceleration of an object in uniform motion is zero.
- Examples of uniform motion include a car moving at a constant speed and a satellite in orbit.
Learn about graphical representation of straight line motion, including distance-time and velocity-time graphs. Understand acceleration as a vector quantity and its relation to velocity.
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