An object of mass 1kg has a PE of 1J relative to the ground when it is at a height of:

0.102 m

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1 m

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9.8 m

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32 m

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Solution

The correct option is B 0.102 m
Potential energy is a relative term so taking ground surface as refrence then potential energy is given by mgh.
So $1 \times 9.8 \times h = 1 J$ all are in SI units.
So $h = 0.102 m$ .

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