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FAQ
Could you tell me what is the meaning of negative/positive sign for plotting friction force? I guess like this: if it is negative, friction force works to the direction to stop sliding motion.
fbadmin(admin) Date: | Read : 3138

Q)
Could you tell me what is the meaning of negative/positive sign for plotting friction force? I guess like this: if it is negative, friction force works to the direction to stop sliding motion.

A) The meaning of sign is direction. When the velocity of model is positive, the sigh of friction is negative. But, when the velocity is negative, friction is positive.
 


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