
Our goal in this project was to build a
“motor” that can lift a 1kg mass to a
height of 1 meter in 10 seconds.

Out total expense did not exceed 20
dollars. (compressed cardboard, billiard
balls, bucket, automotive funnel, vinyl
guttering)

We began our series of motion by removing
the pen holding the swinging ball in place.

The swinging ball then hits the rotating
wrench which swings down and sets the
rolling ball in motion along our gutter system.

The ball rolls down the gutters and knocks
the water bottle over.

The water pours into the bucket that is
attached to the pulley and the 1 kg mass.
The weight of the water lifts the mass.

Swinging ball
- Gravitational potential energy to
rotational kinetic energy

Wrench
- Rotational kinetic energy to circular
motion kinetic energy

Ball
- Circular motion kinetic energy to
potential energy
We met 4 times for this project and we
spent almost 4 hours each meeting.
 Problems we encountered:

› Repositioning the whole project so that the
bucket will go down a full meter.
› Reaching the ten second time goal
› Stopping pool balls once in motion
› … the list goes on…

It was good to finally use all the EF 151
equations in the real world!!