Question

the unit of a body is variable from place to place give reason?

Answer 1

Answer:

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mass of the body is constant as it is property of body, but weight is product of acceleration due to gravity and mass, which may vary from place to place because acceleration due to gravity is different for different places.

Explanation:

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Answer 2

The weight W of a body is equal to the magnitude Fg of the gravitational force on the body." The gravitational acceleration varies from place to place. Sometimes, it is simply taken to have a standard value of 9.80665 m/s2, which gives the standard weight.
In SI base units: kg⋅m⋅s−2
SI unit: newton (N)
Other units: pound-force (lbf)