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A body of mass 15kg is dropped into the water. If the apparent weight of the body is 107N, then the applied thrust will be ___________

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A body of mass 15kg is dropped into the water. If the apparent weight of the body is 107N, then the applied thrust will be ___________

(a) 40 N

(b) 80 N

(c) 60 N

(d) 100 N

The question was posed to me by my college director while I was bunking the class.

I'd like to ask this question from Streamline and Turbulent Flow topic in section Thermal Properties of Matter of Engineering Physics I

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Best answer
The correct choice is (a) 40 N

Best explanation: Apparent weight = Weight – Upthrust

Therefore, Upthrust = Weight – apparent weight

Upthrust = 15 × 9.8 – 107 = 147 – 107 = 40 N.

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