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Subjects
Science State Board
Class 8
Force and presssure
Textboook questions
19.
Answer in detail I
Exercise condition:
4
m.
1. Friction is a necessary evil - Explain.
a. Friction allows us to
slip
grip
almost any thing in our hands.
b. The
friction
contact
between the tyres and the road allows automobiles to travel safely.
c. Frictional resistance on
drums
brake shoes
allows brakes to be applied.
d. Friction produces
electricity
heat
.
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