mass of an object is 40 kg what is its weight on the earth

Weight is given by :

W = Mg

g = 9.8m/s2 , M = 40kg

=> W = 392 N

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by taking g = 9.8m/s2

weight = 392N

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Weight of object = 40 kg Weight on earth = M*g I.e 40*10=400
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