Understanding Newton's First Law

What happens to the chair after the force from the foot is removed?

• It accelerates.

• It moves in the opposite direction.

• It continues to move.

• It stops immediately.

According to Newton's First Law, what is required to change the state of motion of an object?

• A constant velocity

• A net force

• No force at all

• A balanced force

Why does the chair eventually stop moving?

• Because of gravity

• Because of friction

• Due to lack of force

• Due to air resistance

What is necessary to keep an object in uniform motion according to Newton's First Law?

• An unbalanced force

• A changing force

• No net force

• A continuous force

In the example of stones at rest, what does 'no net force' imply?

• No forces are acting on the stones

• Forces are balanced

• The stones are accelerating

• Only gravitational force is acting

What keeps an airplane in uniform motion despite air resistance?

• The shape of the airplane

• The engines and fuel

• The altitude of the airplane

• The weight of the airplane

What indicates the presence of a net force on the tennis ball rolling down?

• The ball moves at a constant speed

• The ball remains at rest

• The ball changes direction

• The ball accelerates

What would happen to the chair if there were no friction?

• It would move backward

• It would move in circles

• It would move forever

• It would stop immediately

What is the role of engines in an airplane's motion?

• To increase the airplane's weight

• To overcome air resistance

• To decrease the airplane's speed

• To change the airplane's direction

What does Newton's First Law suggest about objects in motion?

• They change direction without a force

• They stop without a force

• They need a force to stay in motion

• They naturally stay in motion