WAEC - Physics (2008 - No. 6)
A rectangular block of dimensions 2.0m x 1.0m x 0.5m weighs 200N. calculate the maximum pressure exerted by the block on a horizontal floor.
100Nm-2
200Nm-2
300Nm-2
400Nm-2
Explicació
P = \(\frac{wt}{A} = \frac{200}{0.5 \times 1} = 400Nm^{-2}\)
This is because Area is inversely proportional to pressure, so an increase in pressure leads to a decrease in area and vice versa.