Questions and Answers
What is the unit of acceleration?
What is the formula to calculate acceleration?
What is the type of acceleration that occurs when velocity decreases?
What is the characteristic of an object in uniform motion?
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What does a horizontal line on a velocity-time graph indicate?
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What is an example of uniform motion in real-life?
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What is the shape of a distance-time graph for an object in uniform motion?
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What is the condition for zero acceleration?
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Study Notes
Acceleration
- Definition: Acceleration is the rate of change of velocity. It is a measure of how quickly an object's velocity changes.
- Unit: The unit of acceleration is meters per second squared (m/s²).
- Formula: Acceleration (a) can be calculated using the formula: a = Δv / Δt, where Δv is the change in velocity and Δt is the time over which the change occurs.
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Types of Acceleration:
- Positive Acceleration: An increase in velocity.
- Negative Acceleration: A decrease in velocity (also known as deceleration).
- Zero Acceleration: When velocity remains constant.
Uniform Motion
- Definition: Uniform motion is motion at a constant velocity. The object moves at the same speed in the same direction.
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Characteristics:
- Constant Velocity: The velocity of the object remains the same.
- Zero Acceleration: There is no change in velocity.
- Equal Distance: The object covers equal distances in equal time intervals.
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Graphical Representation:
- Distance-Time Graph: A straight line indicating that the distance traveled is directly proportional to time.
- Velocity-Time Graph: A horizontal line indicating that the velocity remains constant.
- Real-Life Examples: A car moving at a constant speed on a straight road, a train traveling at a constant velocity on a straight track.
Acceleration
- Acceleration is the rate of change of velocity, measuring how quickly an object's velocity changes.
- The unit of acceleration is meters per second squared (m/s²).
- Acceleration (a) is calculated using the formula: a = Δv / Δt, where Δv is the change in velocity and Δt is the time over which the change occurs.
Types of Acceleration
- Positive acceleration: an increase in velocity.
- Negative acceleration: a decrease in velocity, also known as deceleration.
- Zero acceleration: velocity remains constant.
Uniform Motion
- Uniform motion is motion at a constant velocity, moving at the same speed in the same direction.
Characteristics
- Constant velocity: the velocity of the object remains the same.
- Zero acceleration: there is no change in velocity.
- Equal distance: the object covers equal distances in equal time intervals.
Graphical Representation
- Distance-time graph: a straight line indicating the distance traveled is directly proportional to time.
- Velocity-time graph: a horizontal line indicating the velocity remains constant.
Real-Life Examples
- A car moving at a constant speed on a straight road.
- A train traveling at a constant velocity on a straight track.
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Description
Learn about acceleration, its definition, unit, and formula. Understand the different types of acceleration, including positive and negative acceleration.
