Question

Derive the relation for its acceleration when the block is sliding down in presence of friction​

Answer 1

$\huge\mathbb\fcolorbox{purple}{lavenderblush}{✰αηsωεя}$

Friction always acts in the direction opposing motion. This means if friction is present, it counteracts and cancels some of the force causing the motion (if the object is being accelerated). That means a reduced net force and a smaller acceleration

Answer 2

Answer:

Friction always acts in the direction opposing motion. This means if friction is present, it counteracts and cancels some of the force causing the motion (if the object is being accelerated). That means a reduced net force and a smaller acceleration