Friction

Which of the following shows sliding friction?

• a ball rolling on the floor

• a girl playing on a slide

• a man pushing a push cart

• a car travelling along the street

Name

Directions: Read the questions carefully then write the letter of the correct answer

Which of the following are the types of friction? (Choose all possible answers)

• Opposite friction

• Rolling friction

• Sliding friction

• Static friction

Which of these materials do you predict would have the MOST amount of friction?

• metal

• tile

• sand paper

• denim

2. Will it be easier for a person to push a table on a carpeted floor than on tiled floor?

• A. No, because the carpeted floor is rough, so friction is lesser.

• B. No, because the carpeted floor is rough, so friction is greater

• C. Yes, because the carpeted floor is smooth, so friction is lesser.

• D. Yes, because the carpeted floor is smooth, so friction is greater.

Identify the kind of friction in "truck speeding up on the road"

• static friction

• rolling friction

• sliding friction

Patterns of motion can be used to _________.

• make predictions
• make matter
• make energy
• none of these

7. Which of the following forces causes objects to slowdown and eventually stop?

• A. air resistance
• B. friction
• C. gravity
• D. magnetic

How can a sailboat increase its fluid friction?

• Make the sail bigger

• Make the sail smaller

• There is no fluid friction