CHAPTER 05 - GRAVITATION | 9TH PHYSICS NOTES

Qasim Tariq 11-01-2020Notes


After studying this unit, the students will be able to:

  • state Newton's law of gravitation.
  • explain that the gravitational forces are consistent with Newton's third law.
  • explain gravitational field as an example of field of force.
  • define weight (as the force on an object due to a gravitational field.)
  • calculate the mass of Earth by using law of gravitation.
  • solve problems using Newton's law of gravitation.
  • explain that value of g decreases with altitude from the surface of Earth.
  • discuss the importance of Newton's law of gravitation in understanding the motion of satellites.
  • gather information to predict the value of the acceleration due to gravity g at any planet or moon's surface using Newton's law of gravitation.
  • describe how artificial satellites keep on moving around the Earth due to gravitational force.


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  • 9th Physics Notes
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  • Matric Notes
  • Class IX Helping Notes
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  • Matric Part-1 Notes

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