Buoyancy force

An adult male has a volume of about 0.070 m3. How much buoyancy does it affect him when he is completely immersed in water?

Correct result:

F =  686.7 N

Solution:

V=0.07 m3 g=9.81 m/s2 ρ=1000 kg/m3  m=ρ⋅ V=1000⋅ 0.07=70 kg F=m⋅ g=70⋅ 9.81=686710=686710 N=686.7 N

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