A stone is attached at the end of a spring balance. The pointer shows 5 kg wt. Now the spring balance is released such that it is free to fall under the effect of gravity, the pointer will now give a reading equivalent to
A
more than 5 kg wt
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B
less than 5 kg wt
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C
equal to 5 kg wt
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D
zero
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Solution
The correct option is D zero since the spring balance and stone system is in free fall so the spring balance will not experience any force from stone and hence ready will be zero.