does friction does not depend on how hard the two surfaces are pressed against each other is it write or wrong
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16
Yes it depends because you are giving an external force over the surface
And while calculating normal for body you also have to take account of external force you applied on the body...
And while calculating normal for body you also have to take account of external force you applied on the body...
Answered by
5
Friction depends upon two factors:
1. The Nature of the Surfaces:
Friction greatly depends upon the nature of the surfaces when they are pressed against each other i-e. either the surface is smooth or rough. If the surface is smooth, less amount of force is required to move the two surfaces, hence friction will be less. However, if the surfaces are rough then their interlocking between them is strong, hence more amount of force is required to move them. Thus, friction will be more.
2. Force Between Two Surfaces:
Friction also depends upon the amount of force applied on the two surfaces. Large amount of force means more friction. For example, take two blocks weighing 1 kg and 5 kg. Place them on the floor and try to displace them. We'll observe that more force is required to move heavier block on the floor as compared to the lighter block. which clearly shows that force of friction of heavy block is more then light block.
1. The Nature of the Surfaces:
Friction greatly depends upon the nature of the surfaces when they are pressed against each other i-e. either the surface is smooth or rough. If the surface is smooth, less amount of force is required to move the two surfaces, hence friction will be less. However, if the surfaces are rough then their interlocking between them is strong, hence more amount of force is required to move them. Thus, friction will be more.
2. Force Between Two Surfaces:
Friction also depends upon the amount of force applied on the two surfaces. Large amount of force means more friction. For example, take two blocks weighing 1 kg and 5 kg. Place them on the floor and try to displace them. We'll observe that more force is required to move heavier block on the floor as compared to the lighter block. which clearly shows that force of friction of heavy block is more then light block.
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