Forces and Motion Quiz

What is the definition of a force?

• A push or pull on an object
• A change in an object's position
• The mass of an object
• The speed of an object

Which of the following is a contact force?

• Gravitational force
• Frictional force
• Magnetic force
• Electric force

What is the unit of force?

• Kilogram
• Newton
• Joule
• Pascal

Which force opposes the motion of an object?

• Normal force
• Tension force
• Friction force
• Gravitational force

In a free body diagram, what does the length of an arrow represent?

• The direction of the force
• The type of force
• The magnitude of the force
• The mass of the object

What type of force is gravity?

• Contact force
• Field force
• Tension force
• Friction force

What is the normal force?

• The force of gravity on an object
• The force exerted by a surface perpendicular to an object
• The force of air resistance
• The force applied by a rope

If a skydiver experiences a gravitational force of 500 N downward and an air resistance of 250 N upward, what is the net force acting on the skydiver?

• 250 N upward
• 250 N downward
• 500 N upward
• 500 N downward

Which of the following statements about free body diagrams is true?

• They only show contact forces
• They represent all forces acting on a system
• They do not require labels
• They are only used for static objects

What is the role of an agent in a force system?

• To represent the system
• To apply a force on the system
• To measure the forces
• To calculate the net force