When one surface in contact with another surface moves, frictional forces arise - Junior Cycle Science - Question h - 2013
Question h
When one surface in contact with another surface moves, frictional forces arise. Friction makes movement more difficult. Sometimes friction is useful, other times it... show full transcript
Worked Solution & Example Answer:When one surface in contact with another surface moves, frictional forces arise - Junior Cycle Science - Question h - 2013
Step 1
Give one example where friction can be useful.
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Answer
One example where friction can be useful is walking. Without friction between our shoes and the ground, we would not be able to move effectively.
Step 2
Give one example where friction can be unhelpful.
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Answer
An example where friction can be unhelpful is when a car skids on an icy road. This can lead to loss of control and accidents.
Step 3
How can unhelpful friction be reduced?
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Answer
Unhelpful friction can be reduced by using lubrication, such as applying oil to moving parts of machinery to decrease wear and tear.
Step 4
How can friction between air and a moving vehicle be reduced?
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Friction between air and a moving vehicle can be reduced by streamlining the shape of the vehicle. This design minimizes air resistance and drag.
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