Elongation OF Spring APP

A spiral spring of 15mm diameter and 10cm  is firmly attached to a rigid clamp of a stand at  its upper and with the help of a chuck nut. A slotted weight (50×5 gm set) is attached to  its lower end. A pointer is fixed in horizontal position at the lower end of the spring just  above the hanger. A half meter Black painted aluminum pipe is fixed vertically on the same stand. Scale is printed on the aluminum scale from 0 to 50cm. It is kept in front of the pointer such that the tip of the pointer moves just over the scale without touching  it. Supplied with 50 × 5gm slotted weight.