Understanding Friction: Sliding vs. Rolling

Why is it easier to push a box on cylindrical pencils compared to a flat surface?

• The box becomes lighter on pencils.

• The table surface changes with pencils.

• The shape of the pencils reduces friction.

• The pencils are made of a special material.

What is sliding friction?

• A type of friction that increases with speed.

• A force that only occurs with rolling objects.

• A resistive force that opposes sliding motion between surfaces.

• A force that helps objects move faster.

What is another term for sliding friction?

• Static friction

• Kinetic friction

• Rolling friction

• Fluid friction

Why is rolling friction generally less than sliding friction?

• Rolling objects are heavier.

• Rolling friction involves less surface area in contact.

• Rolling friction increases with speed.

• Rolling objects are faster.

Which of the following is an example of rolling friction?

• A book sliding on a table

• A person walking on a path

• A car tire moving on the road

• A box being dragged on the floor