Gravitation and Newton's Law Quiz
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Questions and Answers

What does Newton's universal law of gravitation state?

  • Objects in the universe attract each other with a force directly proportional to the product of their masses and inversely proportional to the distance between them (correct)
  • Every object in the universe repels every other object
  • Objects in the universe attract each other with a force directly proportional to the distance between them
  • Objects in the universe attract each other with a force inversely proportional to the product of their masses

    • What is the formula to find the magnitude of gravitational force between the earth and an object on the surface of the earth?

  • $F = \frac{Gm}{R^2}$
  • $F = \frac{GMm}{R^2}$ (correct)
  • $F = \frac{GMm}{R}$
  • $F = \frac{Gm}{R}$

    • What is acceleration due to gravity?

  • The acceleration experienced by a body moving at constant speed
  • The acceleration of a body in free fall under any influences
  • The uniform acceleration of a body in free fall under the influence of earth's gravity (correct)
  • The acceleration of a body due to air resistance

    • What is meant by free fall?

    <p>When an object falls towards the earth under gravitational force alone</p> Signup and view all the answers

    What is the value of average acceleration due to gravity on the earth's surface?

    <p>$9.8 m/s²$</p> Signup and view all the answers

    What does Newton's universal law of gravitation state?

    <p>Objects attract each other with a force inversely proportional to the product of their masses.</p> Signup and view all the answers

    What is the meaning of free fall?

    <p>The motion of an object falling towards the earth under gravitational force alone and with no other forces acting on it.</p> Signup and view all the answers

    What is acceleration due to gravity?

    <p>The acceleration experienced by an object in free fall under the influence of earth's gravity.</p> Signup and view all the answers

    What is the formula to find the magnitude of gravitational force between two objects?

    <p>$F = \frac{G \times M \times m}{R^2}$</p> Signup and view all the answers

    What is the value of average acceleration due to gravity on the earth's surface?

    <p>$9.8 m/s^2$</p> Signup and view all the answers

    Study Notes

    Newton's Universal Law of Gravitation

    • States that every particle attracts every other particle with a force proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
    • Formula: ( F = \frac{G \cdot m_1 \cdot m_2}{r^2} ) where ( F ) is the gravitational force, ( G ) is the gravitational constant, ( m_1 ) and ( m_2 ) are the masses, and ( r ) is the distance between their centers.

    Gravitational Force on Earth

    • To find the gravitational force between the Earth and an object on its surface, use the formula: ( F = m \cdot g ) where ( m ) is the object's mass and ( g ) is the acceleration due to gravity.

    Acceleration Due to Gravity

    • Refers to the rate at which an object accelerates towards the Earth due to gravitational force.
    • Average value on Earth’s surface: approximately ( 9.81 , \text{m/s}^2 ).

    Free Fall

    • Describes the motion of an object falling solely under the influence of gravity, with no other forces acting (such as air resistance).
    • During free fall, all objects accelerate uniformly at the rate of ( 9.81 , \text{m/s}^2 ).

    Average Acceleration Due to Gravity on Earth's Surface

    • Standard value is ( 9.81 , \text{m/s}^2 ), indicating how quickly an object speeds up when falling.

    Gravitational Force Between Two Objects

    • Gravitational force can be calculated using the formula: ( F = \frac{G \cdot m_1 \cdot m_2}{r^2} ) applicable to any two masses, demonstrating the universal applicability of gravity.

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    Description

    Test your knowledge of gravitation and Newton's universal law with this quiz. Learn about the formula to calculate the magnitude of gravitational force between the earth and an object on its surface.

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