Question

In average, the weight of 1 kilogram mass on tye earth surface is 9.8N. Give reason.​

Answer 1

1.Weight is dependent on the gravitational force and differs. In a dynamics word problem, the force of gravity is assumed as 9.8N[down] . For example, if you get a 1kg object and put it on the surface of Earth, it's mass is 1kg, however it's weight is 1kg×9.8N[down] , which is the gravitational force of Earth's gravity.

2.THE kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value

of the Planck constant h to be 6.62607015×10−34 when expressed in the unit J⋅s, which is equal to kg⋅m2⋅s−1, where the metre and the second are defined in terms of c and ΔνCs.

Unit of: mass

Unit system: SI base unit

Symbol: kg

Avoirdupois: ≈ 2.205 pounds

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