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Force - Coggle Diagram
Force
Force of friction or friction is the force that exists between two surfaces in contact and always opposes the motion of one surface over the other.
Types of friction are static friction, sliding friction and rolling friction.
Static friction is the maximum value of frictional force between two surfaces which can prevent one surface from sliding over the other. It keeps the object stationary when it is placed on a surface.
Sliding or kinetic friction is the friction that results from two surfaces being pressed against each other while sliding. However sliding friction is less than static friction for the same materials in contact.
Rolling friction occurs when one object rolls across the other. Rolling friction is the resistive force that slows down the motion of a rolling ball or wheel.
Advantages of friction are1. Friction between our feet and the ground helps us to walk steadily otherwise we would slip. 2. Friction between the wheels and the road helps a vehicle to move steadily on the road, otherwise it would skid.
Disadvantages of friction are 1. Friction causes wear and tear. A shoe sole wears out after repeated use. 2.The heat produced due to friction is the wastage of energy and can damage machines if it is not controlled.
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Force can change the speed of a moving object, i.e., force can make the object go either slower or faster.
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