1. Define frictional force and explain it by taking an
example. Plot a graph of frictional force against
applied force and explain why kinetic friction is lesser
than static friction.
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Answer:
The force of friction is always exerted in a direction that opposes movement (for kinetic friction) or potential movement (for static friction) between the two surfaces. For example, a curling stone sliding along the ice experiences a kinetic force slowing it down.
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Example - Rubbing both hands together to create heat.
A sled sliding across snow or ice.
Explanation:
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
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