physics

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a 3.5 kg rectangular air mattress is 2.73m long, 1.1m wide, and .124m thick.
what mass can it support in water befor sinking?
answer in units of kg.

so do i do volume times density=mass?
3.5*2.73*1.1*.124=1.303302

  • physics -

    No.
    The bouyancy is equal to volume*densitywater(g).

    Supported Weight=bouyancy-weightmat
    mg=volume*density*g-3.5kg
    masssupported=volume*densiy -3.5kg

    where density is the density of water.

  • physics -

    density of water=1.0*10^3

    so,
    26*3.9*23*(1.0*10^3)-3.5=2332196.5

  • physics -

    I don't know 😭😭😭

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