Force and Newton's Laws: Newton's Third Law of Motion

The video tutorial explains the concept of rocket thrust using Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. This principle is illustrated through examples such as walking and bird flight. The tutorial also reviews Newton's first and second laws, which describe motion and the relationship between force, mass, and acceleration.

What principle allows model rockets to be launched into the air?

• Gravity

• Wind resistance

• Thrust from an opposite force

• Magnetic fields

According to Newton's third law, what happens when a bird flaps its wings downward?

• The air pushes the bird forward

• The air does not affect the bird

• The air pushes the bird downward

• The air pushes the bird upward

Which of the following is an example of Newton's third law of motion?

• A book resting on a table

• A swimmer pushing against the water to move forward

• A person sitting still in a chair

• A car accelerating on a highway

What does Newton's first law of motion state about an object in motion?

• It will eventually stop on its own

• It will continue moving at a constant velocity unless acted upon by an external force

• It will change direction automatically

• It will accelerate without any force

How does Newton's second law of motion relate force, mass, and acceleration?

• Force equals mass plus acceleration

• Force equals mass divided by acceleration

• Force equals acceleration divided by mass

• Force equals mass times acceleration