Answer:
The coefficient of kinetic friction between the block and the surface is 0.5
Explanation:
It is given that,
Initial velocity of the block, u = 10 m/s
Time taken by the block to come to rest, t = 2 s
So, final velocity, v = 0
We need to find the coefficient of kinetic friction between the block and the surface. According to second law of motion :
F = ma
And friction force F = -μmg
i.e.
...........(1)
Firstly, we will find the value of a i.e. acceleration
a = -5 m/s²
So, equation (1) becomes :
So, the coefficient of kinetic friction between the block and the surface is 0.5. hence, this is the required solution.