Lesson 23: Gravity and Friction
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Questions and Answers

What is mass according to Issac Newton?

  • The amount of matter determined by its speed and direction
  • The force of attraction between any two masses
  • The measure of the amount of matter in a body (correct)
  • The measure of volume in a body

What does gravity do to objects with mass?

  • Has no effect on objects with mass
  • Pulls objects with mass toward each other (correct)
  • Creates weightless conditions for objects
  • Pushes objects away from each other

Who discovered the principle of gravity?

  • Nicolaus Copernicus
  • Albert Einstein
  • Galileo Galilei
  • Sir Isaac Newton (correct)

What are everyday examples of gravity mentioned in the text?

<p>Sitting on a chair, jumping on a trampoline, going on the swing (A)</p> Signup and view all the answers

What is the force that holds objects with mass to the Earth's surface?

<p>Gravitational force (A)</p> Signup and view all the answers

Flashcards

What is mass?

The measure of the amount of matter in a body.

What does gravity do?

Gravity pulls objects with mass toward each other.

Who discovered gravity?

Sir Isaac Newton discovered the principle of gravity.

What is gravitational force?

The force that holds objects with mass to the Earth's surface.

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Give examples of gravity in daily life.

Sitting on a chair, jumping on a trampoline, going on the swing.

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