Podcast
Questions and Answers
Acceleration is the rate of change of ______ with respect to time.
Acceleration is the rate of change of ______ with respect to time.
velocity
The unit of acceleration is ______ per second squared.
The unit of acceleration is ______ per second squared.
meters
Acceleration that remains constant over time is called ______ acceleration.
Acceleration that remains constant over time is called ______ acceleration.
uniform
Acceleration that increases the velocity of an object is called ______ acceleration.
Acceleration that increases the velocity of an object is called ______ acceleration.
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The formula for acceleration is a = ______ / Δt.
The formula for acceleration is a = ______ / Δt.
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The acceleration due to gravity is approximately ______ m/s² on Earth.
The acceleration due to gravity is approximately ______ m/s² on Earth.
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An object falling under the sole influence of gravity experiences a constant acceleration of ______ m/s².
An object falling under the sole influence of gravity experiences a constant acceleration of ______ m/s².
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Acceleration is a ______ quantity, meaning it has both magnitude and direction.
Acceleration is a ______ quantity, meaning it has both magnitude and direction.
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The greater the ______, the greater the acceleration.
The greater the ______, the greater the acceleration.
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The children ___ parents had an accident have been given scholarship.
The children ___ parents had an accident have been given scholarship.
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Study Notes
Acceleration
Definition
- Acceleration is the rate of change of velocity with respect to time.
- It is a measure of how quickly an object's velocity changes.
Units
- The unit of acceleration is meters per second squared (m/s²).
- It can also be expressed in other units such as kilometers per hour squared (km/h²) or feet per second squared (ft/s²).
Types of Acceleration
- Uniform acceleration: acceleration that remains constant over time.
- Non-uniform acceleration: acceleration that changes over time.
- Positive acceleration: acceleration that increases the velocity of an object.
- Negative acceleration: acceleration that decreases the velocity of an object, also known as deceleration.
Acceleration Formulas
- Acceleration formula: a = Δv / Δt, where a is acceleration, Δv is the change in velocity, and Δt is the time over which the change occurs.
- Acceleration due to gravity: a = g, where g is the acceleration due to gravity (approximately 9.8 m/s² on Earth).
Examples and Applications
- Free fall: an object falling under the sole influence of gravity, resulting in a constant acceleration of 9.8 m/s².
- Racing cars: acceleration is crucial for achieving high speeds and quick starts.
- Aircraft: acceleration is necessary for takeoff, landing, and maneuverability.
Key Concepts
- Acceleration is a vector quantity, meaning it has both magnitude and direction.
- Acceleration can be caused by a force, such as friction or gravity.
- The greater the force, the greater the acceleration.
Acceleration
Definition and Measurement
- Acceleration is the rate of change of velocity with respect to time.
- It measures how quickly an object's velocity changes.
Units
- The unit of acceleration is meters per second squared (m/s²).
- Other units include kilometers per hour squared (km/h²) and feet per second squared (ft/s²).
Types
Uniform and Non-Uniform Acceleration
- Uniform acceleration remains constant over time.
- Non-uniform acceleration changes over time.
Positive and Negative Acceleration
- Positive acceleration increases an object's velocity.
- Negative acceleration decreases an object's velocity, also known as deceleration.
Acceleration Formulas
- The acceleration formula is a = Δv / Δt, where a is acceleration, Δv is the change in velocity, and Δt is the time over which the change occurs.
- Acceleration due to gravity is a = g, where g is approximately 9.8 m/s² on Earth.
Examples and Applications
Free Fall and Gravity
- Free fall is an object falling under the sole influence of gravity, resulting in a constant acceleration of 9.8 m/s².
- Acceleration due to gravity is approximately 9.8 m/s² on Earth.
Real-World Applications
- Acceleration is crucial for achieving high speeds and quick starts in racing cars.
- Acceleration is necessary for takeoff, landing, and maneuverability in aircraft.
Key Concepts
Vector Quantity and Force
- Acceleration is a vector quantity, meaning it has both magnitude and direction.
- Acceleration can be caused by a force, such as friction or gravity.
- The greater the force, the greater the acceleration.
Grammar: Relative Pronouns
- The sentence describes a situation where children's parents had an accident and as a result, the children received a scholarship.
- The correct answer is D. whose, which is a possessive relative pronoun indicating that the parents belong to the children.
- The sentence structure implies a relationship between the children and their parents, making whose the correct choice.
- The other options, who, which, and whom, do not fit the context and grammatical structure of the sentence.
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Description
Measure the rate of change of velocity with respect to time. Learn about units, types of acceleration and more.