Q1: 1. What is the force that resists the relative motion or tendency of motion between two surfaces in contact?

• A) Gravity
• B) Friction
• C) Tension
• D) Inertia

Q2: 2. Which of the following factors does not affect the magnitude of frictional force between two surfaces?

• A) Nature of surfaces
• B) Surface area in contact
• C) Temperature
• D) Speed of motion

Q3: 3. Which type of friction occurs when an object is in motion through a fluid like air or water?

• A) Static friction
• B) Dynamic friction
• C) Rolling friction
• D) Fluid friction

Q4: 4. What is the coefficient of friction a measure of?

• A) Weight of the object
• B) Frictional force acting on an object
• C) Roughness of the surfaces
• D) Acceleration of the object

Q5: 5. Which type of friction is generally higher, static friction or kinetic friction?

• A) Static friction
• B) Kinetic friction
• C) They are equal
• D) It depends on the surfaces

Q6: 6. In which scenario is friction beneficial in engineering applications?

• A) Sliding doors
• B) Braking systems in vehicles
• C) Reducing heat in machinery
• D) Lubricating moving parts

Q7: 7. What is the purpose of using lubricants in machinery?

• A) Increase friction
• B) Decrease friction
• C) Generate heat
• D) Increase wear and tear

Q8: 8. Which type of friction is involved when a wheel rolls over a surface?

• A) Static friction
• B) Dynamic friction
• C) Rolling friction
• D) Fluid friction

Q9: 9. How does surface roughness affect the frictional force between two objects?

• A) Smoother surfaces have higher friction
• B) Rougher surfaces have higher friction
• C) Surface roughness does not affect friction
• D) Friction is dependent on the weight of the object

Q10: 10. Which law states that the force of friction is directly proportional to the normal force acting on an object?

• A) Newton's First Law
• B) Newton's Second Law
• C) Newton's Third Law
• D) Coulomb's Law of Friction