Answer:

Step-by-step explanation:
Given that,
Mass of a block, m = 2 kg
Velocity of the block, v = 6 m/s
It stopped in 10 s
We need to find the coefficient of friction.
The frictional force is balanced by the opposing force such that,

Where
a is acceleration, a = 6/10 = 0.6 m/s
So,

So, the coefficient of friction is equal to 0.06.