PASCO ME-9502 Statics System - Manual (Page 86)

S t a t i c s S y s t e m E x p . 1 4 : S i m p l e M a c h i n e s – T h e P u l l e y
®
82 012-12876B
4. Use a pencil or dry erase marker pen to outline the base of the Spring Scale. Also mark the position of the top
of the hanging mass.
5. Slowly raise the Spring Scale – slowly enough that there is no appreciable change in the reading on the Spring
Scale.
6. Measure and record the distance, d
1
, that the Spring Scale was raised. Also measure and record the distance,
d
2
, that the hanging mass was raised.
Data Table
Questions
1. How does the relationship of weight (W) and force (F) compare to the relationship of the distance the Spring
Scale was raised (d
1
) and the distance the hanging mass was raised (d
2
)?
2. Compare the value of W/F to the number of threads that crosses the dotted line in the figure of the pulley sys-
tem.
System W F W/F d
1
d
2
Work E
A
B
C
Figure 14.3: Pulley Systems
d
1
Outline
d
2
A B C
Note that the drawings are not to scale. Allow more vertical distance between the components.
Small
Pulley
Large
Pulley
Double
Pulley
Hanging
Mass
Loop the
thread around
the pulley.
Original
position