Answer:
D) miu = 0.17
Explanation:
To be able to solve this problem we must perform a sum of forces in the direction of the movement. This sum of forces must be equal to zero, since the block moves at a constant speed, therefore there is no acceleration.
The friction force is defined as the product of the normal force by the coefficient of friction.
[tex]f=miu*N[/tex]
where:
f = friction force = 50 [N]
miu = friction coefficient
N = normal force [N]
Now the normal force is defined as the force with equal magnitude to the weight of the block but acting in the opposite direction.
[tex]N=300[N][/tex]
Now replacing:
[tex]miu=f/N\\miu=50/300\\miu = 0.166\\ or 0.17[/tex]
