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What force is necessary to barely submerge when given specific gravity& weight in air

  • Thread starter coopertown
  • Start date
  • #1
What force is necessary to just barely submerge (push Mary under fresh water) Mary if her average specific gravity is 0.95 after taking a deep breath and her weight in air is 660 N?


F=mg ; Force of buoyancy=ρgV;



F=mg
660/9.8=mass of air
mass of air=67.3
force of buoyancy= 67.3 x 0.95
=63.94 Newtons

is this right?!?!?! i am panicking!!! physics is so hard omg. fluids are so difficult to understand!!! waaaaaaaaa
 

Answers and Replies

  • #2
ehild
Homework Helper
15,494
1,876


Do not panic!! You have the formula for the buoyant force

Force of buoyancy=ρgV.

What do ρ, g, V mean?

ehild
 

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