The weight of a body in air is 150N. It experience 30N buoyancy from water. Find out the weight of the body in water?
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Answer:Since the average person in water needs about seven to 12 additional pounds of buoyancy to float, a life jacket does not have to support the entire physical weight of a human body. Instead, it supports those seven to 12 pounds, with a few pounds to spare.
Weight difference = 150-100 = 50 N = Buoyant force of water Buoyant Force in water(Fb) = density of water x g x volume of body(Vb) 50 = 1000 x 9.81 x Vb Vb = 50/9810 cubic meter Now, in air Weight of body = mg = 150 N Mass of body,m = 150/9.81 Kg
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Hey mate
Answer is 120 N
weight of the body in air = 150 N
Buoyancy= 30N
Weight of the body in water = Weight of the body in air - buoyancy
= 150 - 30
= 120 N
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