In one of the printed docunent the unit of universal gravitational constant is given Nm2kg-2.Check its correctness for dimension analysis.

It is correct

Explanation:

Given dimension is:

                            Nm² kg⁻²

To find the dimension of the universal gravitational constant, let us state the law of universal gravitational constant.

"every particle attracts every other particle with a force that is directly proportional to their masses and inversely proportional to the mass between them".

  F =

F is the force

G is the universal gravitation constant

m is the mass

r is the distance between them

Using the dimension;

          N  =

         Nm² = Gkg²

  Unit of G = Nm² kg⁻²

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

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a.   mass number from atomic number