Water-powered rice-pounding mortar

Authentic working Vietnamese rice-pounding machine. This device was used in the Theory Problem 1 at the International Physics Olympiad 2008 in Vietnam. Filmed two days after the competition at Vietnam Museum of Ethnology in Hanoi. More on IPhO 2008 at http://ipho2008.hnue.edu.vn/

Category:

Science & Technology

Tags:

• mechanics
• agriculture
• physics
• problems
• IPhO
• 2008
• Hanoi
• Vietnam
• Olympiad
• Contest
• lever
• water
• engine

[roeltje40]

theoretical question 1: only 2.25 points for me :$

-Roeland van Beek, the Netherlands-

[kashcheyevs]

This is still better than the average (1.74 pts) among  all 376 participants. And none has scored a perfect 10 (max 9.75).

[Sjakrad]

lol that question really was terrible:P actually I only understand how it works after I seen it:p

[diep216]

What a pity that none asked me before. I was at the discussion of the theoretical problems so I saw all the problems and the solutions in advance! (Just kidding ;)) but it was very interesting because all of you had chance to see a real machine in the Museum of Ethnology just one day after the exam

[ulkgb]

And it actually works!!!

[deathbytray123]

haha even more than for me^^