## Conceptual Physics (12th Edition)

Find the pressure. $$Pressure = (weight \;density)\times(depth)$$ $$= 10000 \frac{N}{m^{3}} \times (2 m) = 20000 \frac{N}{m^{2}}$$ Now find the force by multiplying pressure by the area. Remember that $1 cm^{2} = 10^{-4} m^{2}$. $$F = 20000 \frac{N}{m^{2}} \times (10^{-4} m^{2}) = 2 N$$ This is a small force.