Question

Answer guys.... Please

Answer 1

a. Rolling friction is the force resisting the motion of a rolling ball or wheel (a curved surface). This type of friction is typically a combination of several friction forces at the point of contact between the wheel and the ground or other surface. ... This is the reason that wheels and ball bearings facilitates motion.

b. Sliding friction: The frictional force offered when one body slides over the other body is called sliding friction

Answer 2

Here us ur answer friend......

When a object rolls over surface of another object, the resistance to its motion is called rolling friction. It is easier to roll than to slide. So, the rolling friction is less than sliding friction. Thus, rolling reduces friction. Rolling reduces interlocking, hence decreases friction.

The frictional force present when one object moves slowly over the surface of another object is known as sliding friction. It is smaller than static friction. Since the interlocking of the two surfaces is less when an object has already started moving, therefore, the sliding friction is smaller than the static friction.

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