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Q.1- What is Friction?, , Ans-Friction is the force that resists motion, when the surface of one object comes in, contact with the surface of another., , Q.2- What is Static friction?, , Ans-The force required to overcome friction an, the instant an object stars moving from rest is, called Static friction., , Q.3- What is Sliding friction?, , Ans-The force required to keep the object, moving with the same speed is called Sliding, friction., , Q.4- What is Rolling friction?, Ans-When one body rolls over the surface of, another body, the resistance to its motion is, , called Rolling friction., , Q.5- Explain why sportsmen use shoes with, spikes?, , Ans-This is because the force of friction, between the shoes and the ground increases, with the help of spikes., , Q.6- Explain why sliding friction is less than, static friction?, , Ans-In Sliding friction, the time given for, interlocking is very small. Thus, interlocking is, not strong. Therefore, less force is required to, overcome this interlocking. Due to this reason,, sliding friction is less than static friction., , 2022-01-13