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course Phy 121
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:
F=.4kg*9.8m/s^2=3.92N
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What is the buoyant force on the ball?
answer/question/discussion:
3.92N-2.5N=1.42N
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What therefore must be its volume?
answer/question/discussion:
1.42N=V*(1g/cm^3)*9.8m/s^2
V=.145cm^3
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What is its density?
answer/question/discussion:
D=(400g/.145cm^3)=2800g/cm^3
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&#Very good responses. Let me know if you have questions. &#