A) i-an increase, ii-an increase
B) i-a decrease, ii-an increase
C) i-an increase, ii-a decrease
D) i-a decrease, ii-a decrease
Correct Answer: B
Solution :
Force of friction occurs because of irregularities present on material surfaces. When two surfaces are in contact, interlocking occurs between the surfaces. Greater the interlocking between the surfaces, greater is the force required to overcome the interlocking. Hence, force of friction decreases with a decrease in interlocking between the surfaces. Also, greater the pressing force, greater is the interlocking between the surfaces. Hence, force of friction increases with an increase in the pressing force between the surfaces. The correct answer is B.You need to login to perform this action.
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