Balancing Cutlery

My favorite restaurant trick

 

 

 

Category - Force & Energy

Key Idea - Centre of Gravity

 

Purpose - Can be used to demonstrate the centre of gravity. 

Arrangement of cutlery and match need for Part 1

 

Balancing of cutlery described in Part 1 

 

Arrangement of cutlery, cork and nail described in Part 2

 

Balancing of cutlery described in Part 2 
Nature -  Demonstration
Materials -  A spoon and two forks, a matchstick, a cork (not a rubber stopper), a nail, a retort stand
Method -  Part 1 - Join a fork and spoon together as shown in figure 1, and wedge the match between the tines of the fork. With a little effort you should now be able to balance the whole contraption on the tip of the retort stand.

Part 2 - Jam the 2 forks into the cork as shown in figure 3, and them jam the nail in the underside. This should also balance on the top of the retort stand.
Safety - Fork wounds!
Explanation - No matter what the shape of an object is, it can balance on it's centre of gravity. These unusual arrangements all obey this law by having a centre of gravity in an unusual place; the tip of the nail or match.
Notes - The centre of gravity of an object can be found by hanging a object by one point and dropping a line from the point straight down, then doing it again from another point. Where the two lines cross is the centre of gravity.

This Wizard was generously supplied by Mr. Mark Bateman