define friction and rolling friction . plz dont write wrong ans becz tomorrow is my exam.
Answers
Answer:
Explanation:
FRICTION ----Friction is a force between two surfaces that are sliding, or trying to slide, across each other. ... Friction always slows a moving object down. The amount of friction depends on the materials from which the two surfaces are made.
ROLLING FRICTION --When a body slides (moves with all its surface area in contact) over another body, the resistance faced is due to sliding friction. On the other hand, if a body rolls (moves with just a single point of its surface in contact) over another body, the resistance offered is a case of rolling friction.
Rolling friction is generally lesser than sliding friction. In rolling, the surfaces in contact don't rub against each other as they do in sliding friction. An example is the case of tires in vehicles. When they are moving on the road, some rolling friction acts on them. When the brakes are applied, rolling motion is reduced and sliding friction takes over to slow down the vehicle.
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Answer:
FRICTION :-
- Friction is a force that comes into play when two surfaces come in contact with each other
- The Frictional force or the force of Friction acts in the opposite direction of the motion of the object.
- The force of Friction opposes the relative motion between the surfaces of two moving objects.
ROLLING FRICTION:-
- The force resisting the motion of a rolling body on a surface is known as rolling friction or rolling resistance.
- Rolling of ball or wheel on the ground is an example of Rolling friction.
- The other type of friction is sliding friction.