Mass is suspended at the center of metal stick by Ewing’s apparatus.

The distance of
center point measures
Young’s modulus of metal stick.

Ewing’s apparatus

Size: W650xD200xH350mm

Weight:
5.5kg

Micrometer(1) : 50mm

Lamp with
power source (1) : Battery 1.5V AAA(1), Lamp
1.5V

Lead
wire(2) : Red(1), Black(1)

Supporter
with knife edge and hanger : H350mm, 50g(1)

Mass : 200g
(7)

Metal Sample : 450×16×5mm, bronze(1),
steel(1), copper (1)