Question

From the equation of the line, determine the value of μk.

Answer 1

@zepdrix @iambatman @Compassionate @goformit100 @bibby @austinL

Answer 2

@gabylovesyou @calculusxy @firejay5 @HelpBlahBlahBlah

Answer 3

I don't see a mu anywhere.
Does that stand for something? :o

Answer 4

I think it does but im not sure what

Answer 5

Maybe somehow we can guess the meaning.
What have you been talking about in class (or what has the instructor been talking about in class)?

Answer 6

forces and friction

Answer 7

here's how the problem starts. Your assignment in lab is to measure the coefficient of kinetic friction between a 350-g block and a smooth metal table. To do so, you decide to launch the block at various speeds and measure how far it slides.

Answer 8

@freckles

Answer 9

http://www.pstcc.edu/departments/natural_behavioral_sciences/Web%20Physics/Experiment%2005web.htm
then I think kinetic friction is muk

Answer 10

how would i solve it with that equation?

Answer 11

oh I was just showing where muk has been used before as kinetic friction
just verifying what it means
also I'm still trying to go over this subject

Answer 12

do you know if we need to integrate?

Answer 13

Well I think the acceleration is given by the slope of that line

Answer 14

so we have acceleration and ...

Answer 15

i dont think we integrate

Answer 16

https://www.physicsforums.com/threads/finding-the-kinetic-friction-force-using-mass-and-acceleration.584159/
This is what I'm reading now.

Answer 17

we are given acceleration and weight

Answer 18

this looks like it gives us a recipe to get the muk

Answer 19

so its .350 kg * 4.8217 ?

Answer 20

well there is one step further to go

Answer 21

Fkf = µkFn
does equation look familiar
we want to solve for muk
divide both sides by Fn

Answer 22

I don't know how to find Fn
do you?

Answer 23

no

Answer 24

but on the link you posted it says after multiplying those two above we divide it by the weight in N of the block, what it the weight?

Answer 25

Well that is what I'm talking about
I don't know what Fn is

Answer 26

me neither

Answer 27

is it normal force

Answer 28

yes but I don't know if i can actually help you anymore
I can identify the acceleration from that line
but that is about it

Answer 29

sorry i'm not more knowledgeable in this area

Answer 30

whats the acceleration

Answer 31

acceleration was the slope of the line

Answer 32

I knew that because velocity was the line
in from calculus we learn the derivative of velocity will give us acceleration

Answer 33

so its 4.8217

Answer 34

If that graph is showing an equation for velocity yes

Answer 35

which I think it is

Answer 36

so we dont know how to find kinetic friction

Answer 37

so it wouldn't be .350 kg*4.8217/.350*9.8

Answer 38

it might be .35 kg *4.8217/9.8
is 9.8 is the normal N I guess
And if the line that was actually given was the line for velocity

Answer 39

But @mony01 This isn't my expertise. I was hoping for a calculus question when I stumble into problem. :p
I didn't know what muk was at the beginning.