Question

The pressure increases on the fluid in a syringe when a nurse applies a force of $42\,N$ to the syringes circular piston, which has a radius of $1.1 \,cm$.

• A. $ 1.1\times 10^{5}Pa $
• B. $ 11\times 10^{5}Pa$
• C. $ 1.1\times 10^{7}Pa $
• D. $ 1.1\times 10^{1}Pa $

Answer 1

Answer: (A)

Force applied $=42\, N$
radius $=1.1\, cm$
Pressure $=\frac{F}{A}=\frac{42}{3.14 \times\left(1.1 \times 10^{-2}\right)^{2}}$
$=1.1 \times 10^{5}\, Pa$