Displaced volume and object weight set the support reading. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
Small displacement leaves forty newtons
Volume 2 cubic metres displaces buoyancy 40 newtons. Weight 80 newtons leaves apparent weight 40 newtons.
W a p p = 80 − 40 = 40 W_{\mathrm{app}}=80 - 40=40 W app = 80 − 40 = 40 Buoyancy scan row Buoyant force and apparent weight are checked. body buoy weight rho=2 kg/m^3 g=10 m/s^2 V=2 m^3 B=40 N W=80 N Wapp=40 N
More displacement leaves ten newtons
Volume 3 cubic metres displaces buoyancy 60 newtons. Weight 70 newtons leaves apparent weight 10 newtons.
W a p p = 70 − 60 = 10 W_{\mathrm{app}}=70 - 60=10 W app = 70 − 60 = 10 Buoyancy scan row Buoyant force and apparent weight are checked. body buoy weight rho=2 kg/m^3 g=10 m/s^2 V=3 m^3 B=60 N W=70 N Wapp=10 N
Heavier object can keep the same reading
Volume 4 cubic metres displaces buoyancy 80 newtons. Weight 90 newtons leaves apparent weight 10 newtons.
W a p p = 90 − 80 = 10 W_{\mathrm{app}}=90 - 80=10 W app = 90 − 80 = 10 Buoyancy scan row Buoyant force and apparent weight are checked. body buoy weight rho=2 kg/m^3 g=10 m/s^2 V=4 m^3 B=80 N W=90 N Wapp=10 N