Transcription of Chapter 10
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Example: biology
Chapter 10
In Chapters 8 and 9, we have learnt aboutthe motion of objects and force as the causeof motion. We have learnt that a force isneeded to change the speed or the directionof motion of an object. We always observe thatan object dropped from a height falls towardsthe earth . We know that all the planets goaround the Sun. The moon goes around theearth. In all these cases, there must be someforce acting on the objects, the planets andon the moon. Isaac Newton could grasp thatthe same force is responsible for all force is called the gravitational this Chapter we shall learn aboutgravitation and the universal law ofgravitation. We shall discuss the motion ofobjects under the influence of gravitationalforce on the earth . We shall study how theweight of a body varies from place to shall also discuss the conditions forobjects to float in GravitationWe know that the moon goes around theearth.
the earth. So, we do not see the earth moving towar ds the apple. Extend the same ar gument for why the earth does not move towards the moon. In our solar system, all the planets go around the Sun. By arguing the same way, we can say that there exists a force between the Sun and the planets. Fr om the above facts Newton concluded that not only ...
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