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