When two objects are rubbed together, it creates a force of friction. We often find it difficult
to walk on smooth oily floor. Friction causes moving object to stop or even helps us to hold
objects properly. It is a very useful force but at the same time it also
becomes an evil.
a. What is the cause of friction ?
b. If an object is moving in east direction, in which direction does the force of friction act
on the body?
c. Give the factors on which force of friction depends.
d. Give two points to support the statement that “ friction is an evil”
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