PASCO SE-8685 Pulley Demonstration System - Manual (Page 7)

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Pulley Demonstration System
7
D. Set up One or More Quadruple Pulley(s) on the Frame
Set up for one quadruple
pulley: a) Attach a hook collar
to the frame and tighten. b)
Hang the quadruple pulley on
the hook collar. c) Loop a
separate piece of string around
each ring and hook to a mass
hanger. d) Add mass. e) Use
the free end of the string for
pulling or attaching measuring
devices. (Note: A variety of
setups can be used, depending
upon your experiment.)
Set up for two quadruple
pulleys: For this setup, have a
lab partner available to hold
the lower pulley while you
string the pulleys. To string,
tie a knot on the hook of the upper pulley and string in the following
direction and sequence (Note: Keep all strings parallel (not crossed):
i) around the outside rung of the lower pulley, ii) up and around the
outside rung of the upper pulley, iii) down and around the third rung on
the lower pulley, iv) up around the third rung on the upper pulley,
v) down and around the second rung on the lower pulley, vi) up and
around the second rung on the upper pulley, vii) down and around the
inside rung on the lower pulley, viii) down and around the first rung on
the upper pulley, viv) Hook string from the upper pulley to a mass
hanger and add weight. x) Add weight to the lower pulley.
E. Set up a Four-Step Pulley on the Frame
a) Fasten the 90
° clamp to a verti-
cal rod. b) Attach the four-step
pulley to the 90
° clamp. c) String
each rung separately. d) Add mass
hangers and masses to balance.
Figure 5a:
Quadruple
pulley
Figure 5b:
Setup with
two quadruple
pulleys
Figure 6a:
Setup for a
Four-Step
Pulley