need help! Name: Physics 220Hy by David Michaels Buoy up for HW A. On the board
ID: 1794233 • Letter: N
Question
need help!
Name: Physics 220Hy by David Michaels Buoy up for HW A. On the board write your responses to the following Score: HW for ILL 15 Foroe Diagrams Activity 15.0 Density 1) Volume of submerged body equals 2) Weight of floating body equals 3) Is it accurate to say heavy bodies sink and light ones float? If not, what's a better way to say of the fluid displaced of the fluid displaced. it? 4) In terms of buoyancy, how does a life jacket work? 5) Why do crocodiles swallow rocks? 6) Why are the people who cannot float 9 times out of 10 male? 7) A 25 kg rock displaces 20 kg of water when submerged. What will its apparent weight be? B. On the board write your responses to the following: 1) Draw a force diagram showing an iceberg is foating in the ocean. What do we call the upwards force that buoys up the iceberg? Which of Newton's three laws would this force diagram represent? 2) Use the mathematical expression for Archimedes Principle (huid depgVud da) and the e sea level, if ice is approximately 90% the density of liquid water. Show your equation andExplanation / Answer
A.
1. volume of the submerged body equals volume of the fluid displaced
2. weight of floating body equals weight of the liquid displaced
3. heavy bpdy sink and light float is incorrect. the correct way is, bodies heavier per unit volume then the water sink in water whereas bodies lighter per unit volume than water float in the water
4. life jacket has very low density and high volume so it displaces a large amount of water and hence has a lot of buoyant force acting on it which can balance out the weight of the person weighing the jacket too
5. Crocodiles swallow rocks to increase their mean density when they dont want to float and stay submerged
6. since the mass density of male body is more than a female body, males need to put in more effort to swim and hence more males cant swim then females
7. m = 25 kg
m' = 20 kg
apparent weight = mg - m'g = 5*9.81 = 49.05 N
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