Pressure under a Solid
1 mark · EasyA metal spike is driven into the ground with a force. Explain why its pointed end helps it go in more easily.
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The point has a small area, so the force creates a high pressure to push it in.
Also accept: Smaller area increases pressure for the same force; High pressure at pointed end
Common mistakes: Referring only to sharpness and not relating to pressure
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Marking points
B1 · 1 mark · Explains that smaller area leads to higher pressure for the same force.
Worked solution
The small area at the point means the same force produces a higher pressure, making it easier to penetrate the ground.