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Example 10.6 A block of wood is kept on atabletop. The mass of wooden block is 5kg and its dimensions are 40 cm × 20e pressure exertedPrcm × 10 cm. Find th

Answer»

Mass of the wooden block = m= 5 kgdimensions = 40 cm × 20 cm × 10 cmthe weight of the wooden block applies a thrust on the table top.That is,Thrust = F = mg= 5 kg × 9.8 m/s²= 49 N

Area of a side = length × breadth = 20 cm × 10 cm = 200 cm² = 0.02 m²

Pressure = thrust/ areaPressure = 49 /0.02= 2450 N/m²

The same thrust in implied when it lies on the given dimension.Area= length × breadth= 40 × 20= 800= 0.08 m²

Pressure = 49/0.08= 612.5Pa



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