1.

Define weight and universal law of gravitation​

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Answer:

Wieght It is force acting on a body.It depends upon 'g' acceleration DUE to gravity and the mass of the OBJECT.

  • Universal Law of gravitation says that two object of mass say 'm' and 'M' attract each with Certain force . This force is DIRECTLY proportional to the product of the mass of object 'm' and'M'and inversely proportional to the SQUARE of distance between them.
  • F=G×m×M\radius square.
  • G is the universal gravitation CONSTANT.
  • 'G'=6.67×10 to the power -11 Newton .m square .kg power -2.


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