Arock weighs 1000N in air and 609N in water.Find its volume.

Answer 1

1. Apply equilibrium to the rock when it is submerged in water.
2. Solve the equation from step 1 for volume

1. Equilibrium:
{Force to hold rock stationary in water (apparent weight)}+ {Buoyant Force on rock} = {Weight of rock in air ¾}

V=1000N-609N/9810N/m^3=0.0399 m^3
V=39.9L

Answer 2

1. Apply equilibrium to the rock when it is submerged in water.
2. Solve the equation from step 1 for volume

1. Equilibrium:
{Force to hold rock stationary in water (apparent weight)}+ {Buoyant Force on rock} = {Weight of rock in air}

V=1000N-609N/9810N/m^3=0.0399 m^3
V=39.9L

Sorry there is no 3/4