Answer:
0.69
Explanation:
Sum of the forces on the sled in the y direction:
∑F = ma
Fn - 52 N = 0
Fn = 52 N
Sum of the forces on the sled in the x direction:
36 N - Fn μ = 0
Fn μ = 36 N
μ = 36 N / Fn
Substitute:
μ = 36 N / 52 N
μ = 0.69
cofficient of kinetic friction is 0.6923
Given Data
Coefficient of kinetic friction μk = /N where fk is force of kinetic friction and N is normal reaction;
we have N = 52 N, and fk = 36 N ;
μk = /N
= 36/52
= 0.6923
cofficient of kinetic friction is 0.6923.
Answer:(D.)
