In the previous question, if `agtmu_sg`, find the work done by friction on the block during time t.

Explanation

To find the work done by friction on the block during time \( t \), we can follow these steps:

### Step 1: Identify the forces acting on the block
The block experiences a kinetic friction force when it slides over the surface. The frictional force can be expressed as:
\[ F_{\text{friction}} = \mu_k m g \]
where \( \mu_k \) is the coefficient of kinetic friction, \( m \) is the mass of the block, and \( g \) is the acceleration due to gravity.
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