Test: Pressure on an area - Year 8 MCQ

Force is measured in Newtons (N). A Newton is the unit of force in the International System of Units (SI). It is defined as the amount of force required to accelerate a mass of one kilogram at a rate of one meter per second squared.

The SI unit of pressure is the Pascal (Pa). It is defined as one Newton per square meter (N/m²). Pressure is a measure of force per unit area, and the Pascal is used to quantify pressure in various scientific and everyday applications.

Area is measured in square meters (m²). This unit represents the two-dimensional space or surface covered by an object or a region. In the context of pressure (Pascals = Newtons per square meter), area is crucial because pressure is force per unit area. Thus, the unit of area must be in square meters (m²) to correctly calculate pressure.

Pressure = force/area = 100 N/20 m² = 5 Pa

Pressure = force/area, area = 3 m x 2 m = 6 m², pressure = 60/6 = 10 Pa

Pressure is defined as the force applied perpendicular to the surface of an object per unit area over which the force is distributed.

80 cm = 0.8 m, 100 cm = 1 m, area = 0.8 x 1 = 0.8 m², pressure = 400/0.8 = 500 Pa

Pressure is inversely proportional to the area over which a force is distributed. If the area increases, the same force will exert less pressure because the force is spread over a larger surface.

Area of foot = 40 cm x 50 cm = 0.4 m x 0.5 m = 0.2 m², area of four feet = 0.8 m², pressure = 64,000/0.8

Pressure is measured in pascals (Pa), which is defined as one newton per square meter (N/m²).