Unit 4.2 Forces and Motion Quiz

What is a frame of reference in physics?

• A tool used to measure forces

• A set of criteria or stated values in relation to which measurements or judgments can be made

• A specific location in space

• The background against which motion is observed

How does a force affect an object?

• It changes the color of the object

• It causes the object to emit light

• It can change the object's state of motion or shape

• It makes the object invisible

What is net force?

• The force that is strongest among all acting forces

• The force that acts alone on an object

• The combination of all the forces acting on an object

• The force that remains after all forces cancel each other out

What is kinetic friction?

• The friction between two stationary objects

• The resistance to motion that occurs when an object moves through a fluid

• The friction between two objects that are moving relative to each other

• The force that propels objects forward

What is drag force?

• The force that increases the speed of an object

• The resistance an object encounters when moving over a surface

• The force exerted by air or another fluid in opposition to the motion of an object through it

• The gravitational pull on an object

Which of the following is NOT a frame of reference?

• A moving train

• The Earth's surface

• The Sun

• A color

What happens when the net force on an object is zero?

• The object accelerates indefinitely

• The object changes color

• The object remains at rest or continues to move at a constant velocity

• The object disappears

Which factor does NOT affect the magnitude of kinetic friction between two surfaces?

• The types of materials in contact

• The velocity of the moving object

• The normal force pressing the surfaces together

• The color of the materials

In which scenario would drag force be greatest?

• A car moving at 10 km/h on a calm day

• A car moving at 100 km/h during a storm

• A car parked on a windy day

• A car moving at 10 km/h with a tailwind

What does it mean if an object has a net force of 10 N to the east?

• The object is moving at 10 m/s

• The object will start moving to the west

• The object will accelerate towards the east

• The object is in equilibrium