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PHY121
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A ball of mass 400 grams is immersed in water. The ball is suspended in the water by a rubber band chain which exerts a tension force of 2.5 Newtons on the ball.
What is the weight of the ball?
answer/question/discussion: ->->->->->->->->->->->-> :
.4 kg * 9.8 m/s^2 = 3.92 Newtons
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What is the buoyant force on the ball?
answer/question/discussion: ->->->->->->->->->->->-> :
Since the rubber band is supporting 2.5 N of that, the water is supporting 1.42 N. 1.42 N /9.8 m/s^2 = .14 kg
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What therefore must be its volume?
answer/question/discussion: ->->->->->->->->->->->-> :
.14 kg = 140 g, so 140 cm^2 must be the volume
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What is its density?
answer/question/discussion: ->->->->->->->->->->->-> :
400 g / 140 cm^3 = 2.9 g/cm^2
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15 min
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