Question

Suppose you balance a 2-kg ball on the tip of your finger, which has an area of 1 cm2. Show that the pressure on your finger is 20 N/cm2, or is 200 kPa.

Answer 1

For the answer to the question above, we have to use this formula
Pressure = P = force / area
Then, just substitute the values of the formula
force = mg = 2(10) = 20 N

area = A = 1 cm² = [1 x 10 ̄ ²]² m²


=> P = 20 N / [1 x 10 ̄ ²]² = 200 x 10³ Pa

= 200 kPa
I hope my answer helped you. Have a nice day!