Forces #2 - Friction

Friction is a force that acts __________________ as motion.

• in the same direction

• in the opposite direction

The force that one surface exerts on another when the two rub against each other is called

• friction

• acceleration

• inertia

• gravity

Which is an example of rolling friction?

• between your shoes and the floor as you walk

• between a boat and water as it travels across the lake

• between a ball and the floor as it moves across the floor

• between the brakes and the wheels on your car

Which are examples of sliding friction?

• between your shoes and the floor as you walk

• between a boat and water as it travels across the lake

• between a ball and the floor as it moves across the floor

• between the brakes and the wheels on your car

Which is an example of fluid friction?

• between your shoes and the floor as you walk

• between a boat and water as it travels across the lake

• between a ball and the floor as it moves across the floor

• between the brakes and the wheels on your car

Which type of friction is involved in a NON-moving object?

• rolling

• static

• sliding

• fluid

Which type of friction is involved in an airplane flying?

• rolling

• static

• sliding

• fluid

Which type of friction is involved in a dolphin swimming?

• rolling

• static

• sliding

• fluid

Which type of friction is involved in a flying squirrel?

• rolling

• static

• sliding

• fluid

Which type of friction is involved in a ladder leaning against the wall?

• rolling

• static

• sliding

• fluid