Question

prepare 15 question and their answer on friction std 8 th friction chapter

Answer 1

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Q1 What is friction?

Ans- The external force applied by a surface (plane or rough) that resists the movement of an object that possess some Kinetic Energy is called friction.

Q-2 What are the different ways in which Friction of a surface could be reduced?

Ans- ●By the application of some Greece or oil.
● By making the surface quite smooth.
● By using a Ball Bearing in a rolling body.

Q3 What are the effects of Friction on some machine's parts??

Ans- Due to Friction some machine parts can worn out. Friction can also lead to the loss of energy.

Q4 What are the various ways that can lead to increase in Friction?

Ans- ● Addition of Rubber to the Shoe's sole.
● Addition of spikes.
● By making the surface rough.

Q5 Why Friction is necessary for the movement of a body?

Ans- It helps to create a great grip while moving thus helps in motion of a body.

Answer 2

✨hey here is ur answer ✨

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Q1) GIVE THE CAUSE OF FRICTION?

ANSWER ➡ ✴ friction is caused bye the interlocking of irregularities in the surfaces of the two objects which are in contact with each other.

Q2) WHAT ARE THE FACTORS AFFECTING FRICTION ?

ANSWER ➡ ✴ 1) the nature of the two surfaces
( smoothness or roughness of the two surfaces )

2) The force with which two surfaces are pressed together.

Q3) EXPLAIN THE TYPES OF FRICTION ?

ANSWER ➡✴ types of friction ⤵

➡ STATIC FRICTION

➡ SLIDING FRICTION

➡ ROLLING FRICTION

STATIC FRICTION : THE maximum frictional force present between any two objects when one object just trends to move or slip over the surface of the object is called static friction.

SLIDING FRICTION : Force present when one object moves slowly over the surface of another object is called as sliding friction.

ROLLING LAUGH : when an object rolls over the surface of another object, the resistance to its motion is called rolling friction

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