Question

The weight Mg of an extended body is generally shown in a diagram to act through the centre of mass. Does it mean that the earth does not attract other particles?

Answer 1

Answer:

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Answer 2

No, it does not mean that there is no attraction of other particles by the earth.

Explanation:

• An infinite number of particles are present in an extended body and an attraction of such particles is done by the earth.
• Rather than displaying all the force, for the clarity purpose, generally it is represented by the single force, Mg, via the body’s centre of mass.
• It is to be noted that each particle is not attracted by the earth. All the forces of attraction produce a resultant, which is Mg. This will act in the mass’ centre (total mass is denoted as M).