Question

h.
2. Give two examples for each of the following.
a. Two types of contact forces
b Rough surface increases friction
c. Oiling or greasing reduces friction
d. Friction is useful in our daily life
e. Friction is sometimes not good​

Answer 1

Answer:

a) Frictional force and Normal force.

b) Sand paper and Bumpy road.

c) Oils

d) Moving a stack, Using Matches for burning fire.

e) While moving bikes when oils are not used.

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