2. Which of the following has the greatest friction?
A. polished floor
B sandy floor
C. tiled floor
D. wet floor


3. Which shows that friction is undesirable?
A pushing furniture
C. walking on wet floor
B. lighting a matchstick D. using breaks when approaching a stoplight


5. How can you best reduce friction between the bottom or feet of furniture and the floor?
Aby smoothing the floor
B. by keeping furniture on their place
C. by applying lubricants like wax o the floor
D. by putting wheels or rollers on the bottom or feet of furniture​