FLUIDS
Name
Due Pre-Lab09: at the beginning of the lab period
Consider a beaker filled partially with water sitting on a scale. The scale reads wb, the total
weight of the beaker and its water in air (Figure 1a). An object of mass m and volume V attached
to a massless string is then lowered into the water until it is fully submerged (Figure 1b). The
scale now reads wb* > wb.
wb
Figure
wb* 1a
Figure 1b
1. Show that the buoyant force B acting on the object is given by B = wb* wb.
2. Show that the volume V of the object is given by V =
wb * wb
, where water is the density of
g water
the water and g is the acceleration of gravity.
3. Show that the density of the object is given by =
IUPUI PHYS 15200
mg
.
wb * wb water
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