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D i s c o v e r C e n t r i p e t a l F o r c e K i t
ME-9837A
4
®
012-15873A
Introduction
The Discover Centripetal Force Kit contains the materials necessary to perform the classical centripetal
force lab similar to the first example listed in the table below. In addition, the Discover Centripetal Force Kit
can be used in conjunction with Force Sensors or Newton Spring Scales.
Centripetal Force
is an often misunderstood physical concept. Among other things, the popular, yet,
misused word "centrifugal" contributes to students' misconceptions. An object moving in uniform circular
motion experiences a net inward-pointing force, called the centripetal force. It is important for students to
identify the agent for each force that contributes to the centripetal force (net force) for an object moving in
uniform circular motion.
The table below gives examples of the centripetal force for certain occurrences:
Included with the Discover Centripetal Force Kit are rubber stoppers of widely varying masses. Convenient
blue ties are provided to attach the stoppers easily to the bright, sturdy string. In addition, one tubes is
included that is chamfered to decrease friction on the string.
Situation
Centripetal Force
An object twirled in a horizontal circle.
Tension from the string.
Car driving in a circle.
Static friction on the tires directed toward the center.
A satellite.
Force due to gravity.
A “centrifuge.”
The normal force from the wall of the “centrifuge.”