Question

A wooden cube of length 5 cm and mass 3 kg is kept on the top of a table. The
pressure exerted by the cube on the top of the table is:
(a) 2352 N/m?
(b) 2552 N/m
(c) 22 N/m
(d) 2221 N/m2
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Answer 1

The pressure exerted by the cube on the top of the table is (d) 2221 N/m2

Pressure is defined as force per unit area. To calculate the pressure exerted by the cube, we can use the following formula:

Pressure = Force / Area

The force exerted by the cube is its weight, which is equal to its mass (3 kg) multiplied by the acceleration due to gravity (9.8 m/s^2).

Area of the cube = (lengthwidthheight) = 555 = 125cm^2

So,

Pressure = (39.8) / (12510^-4) = 2221 N/m2

• Pressure is a measure of the force exerted on a surface per unit area. It is typically measured in units of Pascals (Pa) or pounds per square inch (psi). Pressure can be caused by a variety of factors, including the weight of the atmosphere, the movement of fluids or gases, and the application of mechanical forces.
• It can also be described as the force per unit area exerted in a direction perpendicular to the surface. In physics and engineering, pressure is a scalar quantity.

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