A certain force increases the length of a wire by 1 mm. The force required to increases its length by 2 mm is …………… .

A certain force increases the length of a wire by 1 mm. The force requ

1.	A certain force increases the length of a wire by 1 mm. The force required to increases its length by 2 mm is …………… .
Answer» 2F 4 F 8 F 16 F SOLUTION :`Delta l PROP F`