About the Swiss Selection

The Swiss National Selection will be held at EPFL on December, 14th, 2019. The deadline for registering a team is December, 1st.

The best team will have the privilege to represent Switzerland at the IPT 2020 in Warsaw!

Following the format of the international competition, the participating teams have to work in advance on three problems among the five selected from the official 2020 problems list. They must be able to present a (possibly partial) solution to one of the problem and defend it against other participants and jury members. Participants must also be able to oppose or review two more, hence the need to work on a total of three problems.

The best solutions mix theoretical models and experimental measurements that, hopefully, match !

For more details about the principles of the competition, see the IPT portal.

Problems of the Swiss Selection

These five problems are taken from the official 2020 problems list.

1. Cumulative cannon

How high may a ping-pong ball jump using the setup on the video?
What is the maximal fraction of the total kinetic energy that can be transferred to the ball?

2. Precious energy

Shaking a bottle of carbonated liquid (soda, beer, champagne etc.) before opening it will lead to a fountain of liquid coming out.
Design and optimize a setup to extract electrical energy from opening such a bottle.

3. Paper tube
Roll a long paper strip into a tight tube and put it vertically on a table.
Why does it often unwind in jerks? What determines the period of the jerks?

6. Planetary clock

Propose the most accurate clock that measures time with a temporal resolution of a minute or less using the rotation of the Earth. The clock design should allow calibrating the clock to work even on a different planet. With what certainty will your clock show the correct time after one year?

14. Jumping bean

A simple toy called a “jumping bean” can be constructed by putting a metal ball inside of a pill capsule. Placed on an inclined surface at a certain inclination, the jumping bean will tumble down in a rather surprising way, seemingly standing up-right, flipping end to end, instead of rolling.
Investigate its motion. Find the dimensions of the fastest and slowest beans for a given inclination.

For questions, remarks, suggestions and registration do not hesitate to contact us using the contact form !