Question

Which of the following does not happen due to friction?

(A) A nail is fixed in the wall

(B) fire can be produced with a matchstick.

(C) heat is produced.

(D) durability of chappals increases.

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Answer 1

option C

heat is produced

because  heat is produced to friction

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Answer 2

The correct option for friction is (D) durability of chappals increases.

• The friction force is the force that helps in the motion of objects due to resistance provided at the contact of two surfaces.
• Frictional forces are of three types static, sliding and rolling.
• It acts in the opposite direction of applied force.
• Fixing of nails in the wall is also due to friction developing at the contact.
• In a matchstick rubbing between the two surfaces causes friction.
• The durability of chappals decreases due to friction which causes tears in chappals. when come in contact with a surface rubbing increases the friction and durability decreases.
• The tearing of machine parts is due to the heat produced when friction force comes into play.
• Aeroplane flying is possible due to friction.