Complete Question
The complete question is shown on the first uploaded image
Answer:
the change in energy of the block due to friction is

Step-by-step explanation:
From the question we are told that
The frictional force is

The mass of the block is

The length of the ramp is

The height of the block is

The change in energy of the block due to friction is mathematically represented as

The negative sign is to show that the frictional force is acting against the direction of the block movement
Now substituting values

