Question

Write an activity to show that rolling friction is less than sliding friction

Answer 1

Sliding friction is the force resisting the motion when a body slides on a surface. The force of friction depends on the area of contact between the two surfaces. As the area of contact is less in the case of rolling than in the case of sliding, rolling friction is less than the sliding friction.

Answer 2

Answer:

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Explanation:

Rolling Friction and Sliding Friction

Sliding friction is the force that acts against two surfaces that are rubbing together. Rolling friction is less than sliding friction as the rolling of one body over another requires a smaller area of surface contact than sliding. The following activities will enable middle school students to compare sliding and rolling friction and apply what they have learned to real world scenarios.

Socks vs. Rollers

Materials:

floor marking tape

yard stick

timer

scooter boards

socks

Procedure:

On a smooth surface, such as a gym or tile floor, mark a starting line and a finish line that are approximately 20 feet apart.

Students will measure the amount of time it takes them to sock skate from the start to the finish line. Students will repeat the process 3 times and collect data.

Students will measure the amount of time it takes them to scooter themselves from the start to the finish line. Students will repeat the process 3 times and collect data.

Students will compare the data to conclude that rolling friction is less than sliding friction. Students will explain why they think this is true and how they can apply this information to their daily lives