Question

1. what type of friction occurs between objects that are not in motion?

• a. sliding friction
• b. static friction
• c. rolling friction
• d. fluid friction

1. without static friction, what would happen when you try to walk?

• a. you would move faster
• b. you would feel more resistance
• c. your feet would slip out from under you
• d. you would experience more rolling friction

1. which type of friction is stronger?

• a. static friction is stronger than sliding friction
• b. sliding friction is stronger than static friction
• c. rolling friction is stronger than static friction
• d. fluid friction is stronger than sliding friction

1. what happens when sliding friction occurs?

• a. objects remain stationary
• b. objects move without resistance
• c. objects roll more efficiently
• d. moving objects slow down and stop

Explanation:

1. Static friction acts on objects at rest. Sliding friction is for sliding objects, rolling friction for rolling ones, and fluid friction involves fluids.
2. Static friction helps feet grip the ground. Without it, feet would slip. Moving faster (a) and more resistance (b) are incorrect. Rolling friction (d) is unrelated.
3. Static friction is stronger than sliding friction. Sliding friction (b) is weaker. Rolling (c) and fluid (d) frictions are not stronger than static in this context.
4. Sliding friction opposes motion, causing moving objects to slow and stop. Objects at rest (a), moving without resistance (b), and rolling efficiently (c) are wrong.

Answer:

1. b. Static friction
2. c. Your feet would slip out from under you
3. a. Static friction is stronger than sliding friction
4. d. Moving objects slow down and stop