Physics Free Fall Concepts

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Questions and Answers

What is the value of gravitational acceleration used to describe free fall?

  • 10 m/s² (correct)
  • 11.50 m/s²
  • 9.81 m/s² (correct)
  • 9.00 m/s²

Free fall occurs in the presence of air resistance.

False (B)

What term is used to describe the motion under the action of gravitational force?

free fall

In free fall, all objects experience a constant acceleration due to gravity, which is approximately _____ m/s².

<p>9.81</p> Signup and view all the answers

Match the following scenarios with the correct descriptions of free fall:

<p>Object thrown up = Will eventually fall back down due to gravity Two objects of the same mass in air = Will not necessarily hit the ground at the same time Free fall in a vacuum = All objects fall at the same rate regardless of mass Air resistance present = Affects the speed and time of falling objects</p> Signup and view all the answers

Which of the following statements about free fall is true?

<p>Free fall can occur in a vacuum. (B)</p> Signup and view all the answers

In free fall, two objects of the same mass thrown from the same height will always hit the ground at the same time regardless of air resistance.

<p>False (B)</p> Signup and view all the answers

What is the primary force acting on an object in free fall?

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

In free fall, the acceleration due to gravity is approximately _____ m/s².

<p>9.81</p> Signup and view all the answers

Match the following terms with their descriptions related to free fall:

<p>Free fall = Motion under the influence of gravity Air resistance = Opposes the motion of falling objects in air Gravitational acceleration = Constant acceleration towards the Earth Vacuum = A space without air</p> Signup and view all the answers

Flashcards

Gravity

The force that pulls all objects with mass towards the Earth.

Free Fall

The motion of an object falling only under the influence of gravity. It does not include air resistance.

Gravitational Acceleration (g)

The acceleration of an object in free fall caused by gravity. Its value is approximately 9.81 m/s².

Air Resistance

The resistance experienced by an object moving through air, water, or other fluids.

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Free Fall Misconception

The misconception that objects of different masses fall at the same speed, regardless of their mass, in air.

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What is gravity?

The force of attraction between any two objects with mass. The more massive an object, the more gravity it exerts.

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What is free fall?

The motion of an object falling solely under the influence of gravity, neglecting air resistance.

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What is gravitational acceleration (g)?

The constant acceleration experienced by any object in free fall, approximately 9.81 m/s². It's always directed downwards, toward the center of the Earth.

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What is air resistance?

A force that opposes the motion of an object moving through a fluid like air or water. It depends on factors such as the object's shape, speed, and the density of the fluid.

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Is it true that objects of different masses fall at the same rate in air?

The misconception that objects of different masses fall at the same rate in air. This is incorrect, as air resistance depends on factors other than mass.

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