Question

1. which object has the strongest friction against the surface it is touching (1 point)

a. a ball rolling down the hill
b. a brick being pushed over beach sand
c. slipping on a wet floor
d. a skateboard riding down the street

Explanation:

• Rolling friction (ball rolling, skateboard) is generally less than sliding friction.
• Slipping on a wet floor (option C) has low friction as the water acts as a lubricant.
• When a brick is pushed over beach sand, there is significant sliding friction due to the rough and uneven surface of the sand.

Answer:

B. A brick being pushed over beach sand