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The reading of the spring balance calibrated on the surface of the earth is taken to a planet where the value of g is $7 {m s}^{- 2}$ is 10 kgwt. What is the mass of the object.
10 kg
7 kg
70 kg
14 kg

A

70 kg

B

7 kg

C

14 kg

D

10 kg

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