TED-Ed: Newton's 3 Laws, with a bicycle - Joshua Manley

The video tutorial explains the physics behind bicycle motion using Newton's Laws of Motion. It begins with an introduction to inertia and Newton's First Law, describing how objects in motion stay in motion unless acted upon by a force. The tutorial then delves into Newton's Second Law, explaining how force, mass, and acceleration are related, and how this applies to pedaling a bicycle. Finally, it covers Newton's Third Law, illustrating the concept of action and reaction with examples, including how bicycle tires interact with the ground to propel the bicycle forward.

What does Newton's First Law of Motion, also known as the Law of Inertia, state about objects at rest or in motion?

• Objects in motion will eventually stop on their own.

• Objects at rest will start moving spontaneously.

• Objects at rest stay at rest, and objects in motion stay in motion unless acted upon by an external force.

• Objects in motion will change direction without any force.

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

• Force is the difference between mass and acceleration.

• Force is the product of mass and acceleration.

• Force is the sum of mass and acceleration.

• Force is unrelated to mass and acceleration.

Why is it difficult to pedal a very heavy bicycle according to Newton's Second Law?

• Because the bicycle has no inertia.

• Because the bicycle is too light.

• Because the bicycle has more mass, requiring more force to accelerate.

• Because the bicycle has less mass.

What does Newton's Third Law of Motion explain about the forces involved when a bouncy ball hits the floor?

• The ball exerts a force on the floor, and the floor exerts a smaller force back.

• The ball exerts a force on the floor, and the floor exerts an equal and opposite force back.

• The ball exerts no force on the floor.

• The floor absorbs all the force from the ball.

How does Newton's Third Law apply to the movement of a bicycle?

• The bicycle moves forward because the ground pulls it.

• The bicycle moves forward because the air pushes it.

• The bicycle moves forward because the wheels push backward against the ground, and the ground pushes forward with equal force.

• The bicycle moves forward without any force interaction.