Question

the tip of a hypodermic needle is pressed against someone skin with a force of 2 newton if the tip of a needle has area of 0.000001 metre square what is the pressure exerted on the skin by the needle

Answer 1

P= f/a
P= 2/0.000001
P= 2,000,000
The pressure exerted by the needle is 2,000,000 newton per metre squared.