# An iron ball of density 7.8 g/cm³ and volume 200 cm³ is totally immersed in water.Calculate the up thrust on it.

2
by DNahar

2015-03-13T16:26:28+05:30

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Upthurst force = vdg
where v = volume of iron ball = 200*10^-6 m³
d = density of water = 1000kg/m³
g = gravitational force = 9.8 m/s²
upthurst force = 200*10^-6*1000*9.8
= 1.96N
2015-03-13T18:05:55+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
When a body is immersed in a liquid, the upthrust is
F = ρvg

here;
liquid is water, so ρ=1000 kg/m³
volume, v = 200 cm³ = 200×10⁻⁶ m³
g = 9.8 m/s²

Upthrust, F = ρvg = 10³ × (200×10⁻⁶) × 9.8 = 1.96 N