PASCO ME-6815 PROJECTILE CATCHER ACCESSORY - Manual (Page 7)

012-05091E Projectile Catcher Accessory
3
Suspending the Ball Catcher as a
Pendulum
Secure the rod clamp on top of the support plate to a
support rod that is clamped to the table. Cut two
pieces of string, each about two meters long. Thread
one string through the front two holes in the ball
catcher. Thread the other string through the back two
holes in the ball catcher. Refer to the diagram below
on how to attach the string. Thread the ends of the
strings through the holes in the support plate and
secure them, making sure the catcher hangs level.
Velcro Assembly
You may want to quantify and record the results of
your experiments. To enable the user to measure the
height to which the pendulum swings, a thread must
be connected between the ball catcher and the
launcher. The launcher end slips through a Velcro
assembly, and the amount of extension of the string
shows how far the pendulum swung. See Figure 3.
1. Separate the Velcro hook and loop strips.
2. Cut two square pieces of Velcro loop and one
square piece of Velcro hook.
3. Determine the approximate height at which the
Velcro assembly will be applied. This is deter-
mined by the approximate height at which the ball
catcher hangs.
4. Remove the protective covering from the back of
each Velcro square.
5. Arrange the two square pieces of Velcro loop and
one square piece of Velcro hook onto the vertical
plate of the Projectile Launcher base as shown.
6. Cut one piece of Velcro hook 5 – 6 cm long. Do
not remove the protective backing.
7. Tie a thread to one of the front holes in the ball
catcher.
8. The other end of this thread will pass between the
square piece of Velcro hook (attached to the Pro-
jectile Launcher base) and the long piece of Velcro
hook, which should be applied to the three Velcro
squares attached to the Projectile Launcher base.
Ball Catcher Setup
Figure 2: Suspending the Ball Catcher
Velcro
hook
thread
Projectile
Launcher base
Velcro
loop
ball
catcher
assembly
washer
thumbscrew
string
support plate
Ball Catcher
assembly
thread
ME -6815
PROJECTILE CA
TCHER
ACCESSOR
Y
support plate
support rod
(not included)
rod clamp
Figure 3: Velcro Assembly