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Test: Pressure on an area - Year 8 MCQ


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10 Questions MCQ Test - Test: Pressure on an area

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Test: Pressure on an area - Question 1

What is force measured in?

Detailed Solution for Test: Pressure on an area - Question 1

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.

Test: Pressure on an area - Question 2

What are the SI units of pressure?

Detailed Solution for Test: Pressure on an area - Question 2

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.

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Test: Pressure on an area - Question 3

If pressure is measured in pascals, Pa, and force in newtons, N, then area is measured in .......

Detailed Solution for Test: Pressure on an area - Question 3

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.

Test: Pressure on an area - Question 4

A box weighs 100 N. The area of the box on the ground is 20 m2. What is the pressure of the box on the ground?

Detailed Solution for Test: Pressure on an area - Question 4

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

Test: Pressure on an area - Question 5

A box weighs 60 N. The dimensions of the base are 3 m by 2 m. What is the pressure of the box on the ground?

Detailed Solution for Test: Pressure on an area - Question 5

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

Test: Pressure on an area - Question 6

Which of the following correctly defines pressure?

Detailed Solution for Test: Pressure on an area - Question 6

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

Test: Pressure on an area - Question 7

The dimensions of the base of a box are 80 cm by 100 cm. It weighs 400 N. What is the pressure on the ground?

Detailed Solution for Test: Pressure on an area - Question 7

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

Test: Pressure on an area - Question 8

What happens to the pressure exerted by a force if the area over which the force is applied increases?

Detailed Solution for Test: Pressure on an area - Question 8

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.

Test: Pressure on an area - Question 9

The size of an African elephant's foot is 40 cm by 50 cm. The elephant weighs 64,000 N. When standing on the ground, what is the pressure it exerts?

Detailed Solution for Test: Pressure on an area - Question 9

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

Test: Pressure on an area - Question 10

Which of the following units is used to measure pressure?

Detailed Solution for Test: Pressure on an area - Question 10

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

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