PASCO ME-6964 PAStrack Wheel Set - Manual (Page 9)

®
M o d e l N o . M E - 6 9 6 4 M a i n t e n a n c e a n d R e p l a c e m e n t P a r t s
9
When the sail is attached to the PAStrack with wheels, the cart and PAStrack with
wheels move in opposite directions.
Activity 4: The Slingshot Effect
The cart was visually observed to be
nearly stationary (relative to the observer)
before the collision and moving to the left
faster than the PAStrack with wheels after
the collision. The data (right), collected by
a motion sensor attached to the PAStrack
with wheels, show that the speeds before
and after the collision were approximately
equal.
Activity 5: Inclined Plane
When the cart and PAStrack with wheels are released together on the inclined plane,
the cart does not move relative to the PAStrack with wheels; both accelerate at the
same rate. When the level PAStrack with wheels is accelerated by hand, the cart
remains stationary in the lab frame.
Activity 6: Rotational Inertia
When the PAStrack with wheels is accelerated by hand, the disk and ring both move
to the right, but the ring moves farther.
When the disk, ring, and PAStrack with wheels are all released on an inclined plane,
they all accelerate at the same rate. Since the round objects do not move relative to the
PAStrack with wheels on which they are resting, they do roll and their respective rota-
tional inertias are not important.
Maintenance and Replacement Parts
The PAStrack with wheels is not designed to withstand abuse such as being dropped
or stood on. Excess weight or shock may cause damage.