Static Friction and Atomic Charge Quiz

What is static friction?

• Friction when surfaces are in motion
• Friction when surfaces are at rest
• Friction that occurs only on rough surfaces
• Friction that occurs only with liquids

Which of the following is an example of static friction?

• A car sliding on ice
• A book resting on a desk
• A ball rolling down a hill
• A person pushing a box

Which method is NOT a way to reduce friction?

• Adding a lubricant
• Smoothing the surface
• Increasing the weight of the object
• Using wheels instead of sliding

What effect does smoothing a surface have on friction?

• Increases friction
• Decreases friction
• Has no effect on friction
• Makes friction unpredictable

How can friction be increased?

• By using lubricants
• By making the surface rougher
• By reducing the weight of the object
• By using wheels

What happens to the hills and valleys on a surface when more force is applied?

• They become smoother
• They become deeper
• They disappear
• They become wider

What are atoms primarily made of?

• Protons and neutrons only
• Electrons only
• Protons, neutrons, and electrons
• Only protons and electrons

What is the charge of a neutral atom?

• Positive
• Negative
• Neutral
• Variable

How does an atom become negatively charged?

• By gaining protons
• By losing protons
• By gaining electrons
• By losing neutrons

If an atom loses electrons, what charge does it become?

• Negatively charged
• Positively charged
• Neutral
• Unstable