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A boy weighing 30 kg is sitting on a cha...

A boy weighing 30 kg is sitting on a chair. How much reaction acts on the boy ?

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According to Newton.s `3^(rd)` law of motion action = reaction. The boy sitting on chair imparts 30 N force on chair, then according to `3^(rd)` law of motion reaction of chair is 30 N on boy.
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