Question

1. rolling friction
2. air friction
3. viscous

friction

1. sliding friction
2. friction

a. resistance of a fluid on an object.
b. resistance of air pushing against an
object.
c. resistance of two objects pushing
against each other.
d. any force that resists motion.
e. resistance of a wheel or ball.

Explanation:

• Rolling friction is related to the resistance when a wheel or ball rolls, so 1 - E.
• Air friction is the resistance of air pushing against an object, so 2 - B.
• Viscous friction is the resistance of a fluid (like a viscous liquid) on an object, so 3 - A.
• Sliding friction is the resistance of two objects sliding (pushing against each other in a sliding manner), so 4 - C.
• Friction in general is any force that resists motion, so 5 - D.

Answer:

1. E. Resistance of a wheel or ball.
2. B. Resistance of air pushing against an object.
3. A. Resistance of a fluid on an object.
4. C. Resistance of two objects pushing against each other.
5. D. Any force that resists motion.