desirable and undesirable effects of friction
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desirable and undesirable effects of friction
unwanted effects of friction
harmful effects of friction
negative effects of friction
the benefits and drawbacks of friction
friction is always undesirable
disadvantages and advantages of friction
what are the effects of friction
give a disadvantage of friction
advantage and disadvantages of friction
what are the disadvantages of friction
good effect of friction
how is friction harmful
write the disadvantages of friction
how can friction be bad
ways friction is harmful
desirable and undesirable effects of friction, unwanted effects of friction, harmful effects of friction, negative effects of friction, the benefits and drawbacks of friction, friction is always undesirable, disadvantages and advantages of friction, what are the effects of friction, give a disadvantage of friction, advantage and disadvantages of friction, what are the disadvantages of friction, good effect of friction, how is friction harmful, write the disadvantages of friction, how can friction be bad, ways friction is harmful