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Physics Help

DoctorEeevil
By DoctorEeevil
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I'm doing some physics homework, and one question requires me to find the coefficient of kinetic friction between an object, and the ground using only the force applied to the object, and the total mass (a manipulated variable) of the object being pushed. I have 8 different mass values, and 8 different applied force values, and I have to find the coefficient of friction using them. Help?

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F = MU * R WHERE R IS THE NORMAL REACTION FORCE = MASS * 9.806

CPU: Intel 3570 GPUs: Nvidia GTX 660Ti Case: Fractal design Define R4  Storage: 1TB WD Caviar Black & 240GB Hyper X 3k SSD Sound: Custom One Pros Keyboard: Ducky Shine 4 Mouse: Logitech G500

 

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Force friction = mew(aka coefficent of friction) * normal force. Normal force is just mass in newtons as long as its not pulled at an angle.

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F = MU * R WHERE R IS THE NORMAL REACTION FORCE = MASS * 9.806

If the object is in constant motion, does that mean I can say Fnet = 0, and by extension Fapp (Force applied) - Ff (Force friction) = 0, meaning that Fapp=Ff?

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If the object is in constant motion, does that mean I can say Fnet = 0, and by extension Fapp (Force applied) - Ff (Force friction) = 0, meaning that Fapp=Ff?

Constant velocity, if there is unbalanced forces that causes an acceleration which is a change in velocity. Force due to friction = Force being applied to the block. TL;DR yes. It's just an application of newtons law F = ma.

CPU: Intel 3570 GPUs: Nvidia GTX 660Ti Case: Fractal design Define R4  Storage: 1TB WD Caviar Black & 240GB Hyper X 3k SSD Sound: Custom One Pros Keyboard: Ducky Shine 4 Mouse: Logitech G500

 

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Yeah, Force of friction=mew*normal force

 

Is this on an angle, or flat?
 

n0ah1897, on 05 Mar 2014 - 2:08 PM, said:  "Computers are like girls. It's whats in the inside that matters.  I don't know about you, but I like my girls like I like my cases. Just as beautiful on the inside as the outside."

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Yeah, Force of friction=mew*normal force

 

Is this on an angle, or flat?

 

Flat. The initial post was me before I realized that it wasn't on an incline, and was in constant motion.

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Flat. The initial post was me before I realized that it wasn't on an incline, and was in constant motion.

So then you dont need help?

n0ah1897, on 05 Mar 2014 - 2:08 PM, said:  "Computers are like girls. It's whats in the inside that matters.  I don't know about you, but I like my girls like I like my cases. Just as beautiful on the inside as the outside."

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So then you dont need help?

Only with my second question. I'm fine now, thanks.

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