How to find Coefficient of Friction w/ Fa and mass?

[HomiesontheRise]

Homework Statement

A team of six poodles are pulling a 14.0 kg sled at 8.0 m/s

IF the dogs are applying a 66N force, find the coefficient of kinetic friction

Homework Equations

Ff=u*Fn
Fnet=ma
Fnet=(-Ff)+Fa

The Attempt at a Solution

I honestly have no clue where to start for this question.

 

[PhanthomJay]

Homework Statement

A team of six poodles are pulling a 14.0 kg sled at 8.0 m/s

IF the dogs are applying a 66N force, find the coefficient of kinetic friction

Homework Equations

Ff=u*Fn
Fnet=ma
Fnet=(-Ff)+Fa

The Attempt at a Solution

I honestly have no clue where to start for this question.

Homework Statement

A team of six poodles are pulling a 14.0 kg sled at 8.0 m/s

IF the dogs are applying a 66N force, find the coefficient of kinetic friction

Homework Equations

Ff=u*Fn
Fnet=ma
Fnet=(-Ff)+Fa

The Attempt at a Solution

I honestly have no clue where to start for this question.

Well you have correctly listed the relevant equations, now first identify what the acceleration is and solve. Read the problem carefully.

 

[HomiesontheRise]

So I started by finding the Net Force which was 0 due to the fact that there is no acceleration (velocity is constant).
Then found Force of Friction using Fnet and Fa with the formula Fnet=Fa+(-Ff).
Then found Fn using Fn=mg.
Finally, I user Ff=Fn*u to find u

MY WORK
1.
Fnet=0 Fnet-Fa=-Ff 0-66=-Ff -66=-Ff
2.
Fn=mg Fn=14kg*9.8 Fn=137.2
3.
Ff=u*Fn u=Ff/Fn 66/137.2=u 0.48=u

 

[HomiesontheRise]

Please tell me if you see any errors in my calculations

 

[HomiesontheRise]

Well you have correctly listed the relevant equations, now first identify what the acceleration is and solve. Read the problem carefully.

Does this look right?
1.
Fnet=0 Fnet-Fa=-Ff 0-66=-Ff -66=-Ff
2.
Fn=mg Fn=14kg*9.8 Fn=137.2
3.
Ff=u*Fn u=Ff/Fn 66/137.2=u 0.48=u

 

[PhanthomJay]

Look

Does this look right?
1.
Fnet=0 Fnet-Fa=-Ff 0-66=-Ff -66=-Ff
2.
Fn=mg Fn=14kg*9.8 Fn=137.2
3.
Ff=u*Fn u=Ff/Fn 66/137.2=u 0.48=u

Looks good!