Question

A wooden block of a mass of 2.0kg is 20cm thick by 10cm wide by 30cm tall.
calculate the minimum and maximum pressure this block could exert on the surface ?​

Answer 1

Answer:

See below ↓↓

Explanation:

Formula

• Pressure = Force/Area

Force

• It will be constant in both cases as mass remains the sam
• F = mg = 2 x 10 = 20 N

Case (i) : Maximum Pressure

• Area has to be minimum
• A = 10 x 20 = 200 cm² ≅ 0.02 m²
• P = F/A = 20/2 x 10⁻² = 1000 Pa

Case (ii) : Minimum Pressure

• Area has to be maximum
• A = 30 x 20 = 600 cm² ≅ 0.06 m²
• P = F/A = 20/6 x 10⁻² = 3.33 x 10² = 333 Pa