Sanjana performed an experiment to find the amount of force needed to move a 1 kg block over four different surfaces - wood, sandpaper, concrete and glass. Which of these will show minimum reading?

Wood

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Sandpaper

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Concrete

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Glass

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Solution

The correct option is D Glass
Generally, less friction is produced when smooth surfaces move against each other while more friction is produced when rough surfaces move against each other. Hence, reading on the scale with glass surface would be smallest.

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Sanjana performed an experiment to find the amount of force needed to move a 1 kg block over four different surfaces - wood, sandpaper, concrete and glass. Which of these will show minimum reading?

The correct option is D GlassGenerally, less friction is produced when smooth surfaces move against each other while more friction is produced when rough surfaces move against each other. Hence, reading on the scale with glass surface would be smallest.

The correct option is D Glass
Generally, less friction is produced when smooth surfaces move against each other while more friction is produced when rough surfaces move against each other. Hence, reading on the scale with glass surface would be smallest.