Calculate Frictional Force for 800N Force on 100kg Block

[emilyn]

1. A force of 800N parallel to the plane is applied to a 100kg block on the plane to push it up the plane. If the component of the weight down the incline plane is 500 N, what is the frictional force?



2. Frictional force = u.Normal Force



3. Fi = Wx + Ff
Ff = Fi - Wx
Ff = 18 N

 

[tiny-tim]

Welcome to PF!

Frictional force = 1/Normal Force
…
Fi = Wx + Ff
Ff = Fi - Wx
Ff = 18 N[/b]

Hi emilyn! Welcome to PF!

Nooo … frictional force = normal Force times coefficient of friction (µ).

(or µ = frictional force/normal force )

Try again!