X1011569347-00116-31021</DOCNO> Thought experiment, stage 1 Slide 5 of 18 Thought experiment, stage 1 Drop mixture of silt and sand into a beaker of water (let all particles have similar shapes and densities) Detritus will sink to bottom of the beaker Sand-sized particles sinks more quickly Silt-sized particles sinks more slowly In a vacuum, all objects fall at the same rate because gravity exerts a force on each object proportional to its mass (F = m g) When objects settle through a fluid, gravitational force must overcome the viscous drag exerted by the fluid Objects must displace fluid in order to move through it;
(the viscous drag; exerted; by the fluid Objects) (all objects; fall; at the same rate) (gravitational force; must overcome; the viscous drag exerted by the fluid Objects) (gravity; exerts; a force on each object proportional to its mass (F = m) (objects; settle; through a fluid) (Sand-sized particles; sinks; more quickly Silt-sized particles)
the viscous drag all objects gravitational force gravity objects Sand-sized particles
exerted fall must overcome exerts settle sinks
by the fluid Objects
at the same rate
the viscous drag exerted by the fluid Objects
a force on each object proportional to its mass (F = m
through a fluid
more quickly Silt-sized particles