conduct an experiment to find out the effect of roughness on frictional force​

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Do as written above

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Take any ball and play in such a place where rough is too like where land is not good for walking ...Roll a ball use stop watch and calculate the time when you first time roll the ball and then stop the watch when it stops rolling find out the difference between them

same roll a ball on smooth surface like marble calclute the start and ending time find out the difference and diffrentaite which type of land more time to roll .

Explanation:

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