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Questions and Answers
What is the total force exerted by a body perpendicular to the surface in the downward direction known as?
What is the force acting perpendicular on unit area of the surface defined as?
If the mass of a rectangular block is 2 kg, what is the thrust on the surface of the ground due to the block's weight?
Why can a sharp knife be more effective in cutting a bread than a blunt knife?
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Why can a camel walk easily in a desert than a human being?
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Study Notes
Forces and Pressure
- The total force exerted by a body perpendicular to the surface in the downward direction is known as thrust.
- Pressure is the force acting perpendicular on unit area of the surface.
Thrust and Weight
- The thrust on the surface of the ground due to the weight of a rectangular block is equal to its weight, which is given by the mass of the block multiplied by the acceleration due to gravity (g = 9.8 m/s²).
- For a 2 kg rectangular block, the thrust on the surface of the ground would be approximately 19.6 N.
Pressure and Surface Area
- A sharp knife is more effective in cutting a bread than a blunt knife because the pressure exerted by the sharp knife on the bread is greater due to its smaller surface area.
- The pressure exerted by a sharp knife is greater than that of a blunt knife, allowing it to cut more efficiently.
Adaptation and Environment
- A camel can walk easily in a desert than a human being because of its unique adaptations, such as broad, padded feet, which exert a lower pressure on the sand, allowing it to move more easily.
- The camel's adaptation to its desert environment enables it to walk more efficiently than a human being, who would sink into the sand due to the higher pressure exerted by their feet.
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Description
Test your knowledge of thrust and pressure with this quiz. Explore concepts such as railway track construction, weight distribution, knife sharpness, and tire width.
