fill in the blanks :-
1..a frictional force always acts in a direction__________to the motion of a body.
2... All the surfaces have_________microscopic irregularities.
3... Use of wheels and bearings___________ the frictional force.
4... Soles of the shoes are usually grooved to__________the friction.
5... A___________surface has more friction than a__________smooth.
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1 opposite
2some
3reduce
4increase
5rough and smooth surface
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2some
3reduce
4increase
5rough and smooth surface
please thank me and follow me
mark
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