Acceleration in Physics
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Questions and Answers

Acceleration is the rate of change of ______ with respect to time.

velocity

The unit of acceleration is ______ per second squared.

meters

Acceleration that remains constant over time is called ______ acceleration.

uniform

Acceleration that increases the velocity of an object is called ______ acceleration.

<p>positive</p> Signup and view all the answers

The formula for acceleration is a = ______ / Δt.

<p>Δv</p> Signup and view all the answers

The acceleration due to gravity is approximately ______ m/s² on Earth.

<p>9.8</p> Signup and view all the answers

An object falling under the sole influence of gravity experiences a constant acceleration of ______ m/s².

<p>9.8</p> Signup and view all the answers

Acceleration is a ______ quantity, meaning it has both magnitude and direction.

<p>vector</p> Signup and view all the answers

The greater the ______, the greater the acceleration.

<p>force</p> Signup and view all the answers

The children ___ parents had an accident have been given scholarship.

<p>who</p> Signup and view all the answers

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.

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