Physics: Unit 2 Retest

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

• An object will remain at rest or in uniform motion unless acted upon by an external force.

• The acceleration of an object is directly proportional to the net force acting on it.

• For every action, there is an equal and opposite reaction.

• The force of gravity acts between all masses.

What is the term for the tendency of an object to resist a change in its state of motion?

• Acceleration

• Inertia

• Momentum

• Force

Which of the following is a model that can be used to represent Newton's First Law?

• A free-body diagram showing balanced forces

• A periodic table

• A food web

• A Punnett square

Which mathematical formula represents the relationship between force, mass, and acceleration?

Which of the following is an example of Newton's First Law in everyday life?

• A book resting on a table remains at rest until pushed.

• A ball speeding up as it rolls down a hill.

• A rocket accelerating in space.

• A car turning a corner.

Which of the following best describes a system in equilibrium according to Newton's First Law?

• The net force on the system is zero.

• The system is accelerating.

• The system is changing direction.

• The system is losing mass.

A car is moving at a constant velocity. According to Newton's First Law, what can you infer about the forces acting on the car?

• The net force is zero.

• The net force is positive.

• The net force is negative.

• The car is accelerating.

If a 2 kg object is at rest and remains at rest, what can you conclude about the forces acting on it?

• The forces are balanced.

• There is a net force acting on it.

• The object is accelerating.

• The object is moving.

Which of the following scenarios best demonstrates inertia?

• A passenger continues moving forward when a car suddenly stops.

• A ball rolling down a hill speeds up.

• A rocket launches upward.

• A light bulb turns on.

A satellite orbits Earth at a constant speed. Which concept explains why it continues in motion?

• Inertia

• Friction

• Gravity only

• Air resistance