Question

friction produce
( a) hear
( b) wear and tear ​

Answer 1

Answer:

Friction produces heat which damages the moving parts of a machine. Friction produces wear and tear on the contacting surfaces. This reduces the life of machine parts, tyres and shoe soles. A lot of energy is wasted in overcoming the friction before an object starts moving.

Answer 2

Option b is correct

Wear and tear ​

Explanation :

• Friction is the force that exists between two surfaces that are sliding (or attempting to slide) over one another.
• Friction, for example, makes it difficult to push a book across the floor.
• Friction always acts in the opposing direction of the object's movement or attempt to move. A moving item is always slowed down by friction.
• The degree of friction is determined by the materials used to create the two surfaces.
• The more friction is created, the rougher the surface becomes. Friction creates heat as well.
• You can feel your hands warming up if you rub them together fast.