Question

The block pictured below is sliding on a table, moving to the right. The only horizontal force on the block is the force of friction toward the left.
What statement BEST describes the motion of the block?

• A. The block speeds up as it moves left
• B. The block slow down as it moves right
• C. The block speeds up as it moves right
• D. The block slows down as it moves left
• E. The block moves at constant velocity

Answer 1

The correct option is B The block slow down as it moves right

We know that frictional force always opposes the motion and acts in the direction opposite to the motion .As the body is moving right , frictional force will act towards left and will produce a retardation , that's why the velocity of the block slow down .