5.
Collect at least six objects of different materials. Check them for their friction by sliding an
object on their surfaces. Now arrange them according to their friction (high to low). How their
friction can be reduced? Suggest some methods according to the materials (6 marks)
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Specific examples of sliding friction include:
Rubbing both hands together to create heat.
A sled sliding across snow or ice.
Skis sliding against snow.
A person sliding down a slide is an example of sliding friction.
A coaster sliding against a table.
A washing machine pushed along a floor.
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