Quiz 1

What is the SI unit of force?

• Newton (N)
• Ohm (Ω)
• Pascal (Pa)
• Watt (W)
• Joule (J)

Which of the following best describes Newton's First Law of Motion?

• An object at rest tends to stay at rest, and an object in motion tends to stay in motion unless acted upon by an external force.
• The momentum of an object is conserved.
• The force of an object is equal to its mass times acceleration.
• For every action, there is an equal and opposite reaction.
• The velocity of an object is directly proportional to the net force acting on it.

When two forces act in opposite directions on an object, and their magnitudes are equal, what is the net force?

• Zero
• The square of the forces
• The sum of the forces
• The difference between the forces
• The average of the forces

Which of the following is an example of a contact force?

• Frictional force
• Gravitational force
• Electrostatic force
• Magnetic force
• Nuclear force

Which law of motion is often described as "Action and reaction are equal and opposite"?

• Newton's Third Law
• Hooke's Law
• Newton's First Law
• Newton's Second Law
• Kepler's Law

When an object is in equilibrium, what can you say about the net force acting on it?

• The net force is zero.
• The net force is unpredictable.
• The net force is always maximum.
• The net force is equal to the weight of the object.
• The net force is constant.

What is the primary factor that determines the amount of friction between two surfaces?

• The materials from which the surfaces are made
• The force applied to the object
• The weight of the object
• The temperature of the surfaces
• The color of the object

Which surface would require more force to get a book moving?

• Carpet floor
• Wooden floor
• Tile floor
• Concrete floor
• Metal floor

Why do you need to push a book harder to get it moving on a carpet compared to a wooden floor?

• There is more friction between the carpet and the book.
• Carpets have less friction than wooden floors.
• Wooden floors are rougher than carpets.
• The weight of the book is higher on carpets.
• Carpets have higher temperatures, causing more friction.

On which planet in our solar system would you weigh the most due to its strong gravitational pull?

• Jupiter
• Earth
• Mars
• Venus
• Neptune