Forces and Motion

What is a force in physics?

• A push or a pull on an object

• A change in an object's position

• The speed and direction of an object's motion

• The rate at which an object changes its velocity

What happens to an object when the forces acting on it are balanced?

• The object accelerates

• The object changes its direction

• The object remains still or continues at a constant velocity

• The object's mass increases

How is motion defined in physics?

• Any kind of push or pull on an object

• A change in an object's position

• The force that pulls objects towards the Earth

• The resistance an object has to a change in its state of motion

What term describes a change in an object's velocity?

• Force

• Motion

• Acceleration

• Gravity

What does Newton's First Law of Motion state about objects?

• An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an outside force.

• Force equals mass multiplied by acceleration.

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

• Objects always move in a straight line, regardless of external factors.

What causes a moving dodgeball to eventually stop or change direction?

• Its own internal energy running out.

• An outside force acting upon it.

• The ball naturally wanting to return to rest.

• The mass of the ball decreasing.

According to Newton's Second Law of Motion, what is the relationship between force, mass, and acceleration?

• Force is inversely proportional to mass and acceleration.

• Force equals mass divided by acceleration.

• Force equals mass multiplied by acceleration.

• Force is unrelated to mass or acceleration.

When a dodgeball hits an opponent, causing the opponent to exert an equal and opposite force back on the ball, which of Newton's Laws of Motion is being demonstrated?

• Newton's First Law of Motion

• Newton's Second Law of Motion

• Newton's Third Law of Motion

• The Law of Conservation of Energy