Gravity: How Do We Know?

The video begins by describing the thrilling experience of riding a roller coaster, highlighting the sensations of weightlessness and heaviness due to gravity. It then explains how gravity is the main force at work, similar to the forces astronauts experience during space travel. The video further explores gravity's role in everyday life, such as keeping Earth in orbit around the sun. Finally, it poses the question of how we know gravity exists despite being invisible, encouraging further exploration of this fundamental force.

What sensation do you feel when the roller coaster drops?

• Heaviness

• Weightlessness

• Calmness

• Dizziness

How does the force experienced on a roller coaster compare to that felt by astronauts?

• It is similar to what astronauts feel.

• It is stronger than what astronauts feel.

• It is unrelated to what astronauts feel.

• It is weaker than what astronauts feel.

What force is responsible for bringing you back down when you jump on a trampoline?

• Magnetism

• Inertia

• Friction

• Gravity

What keeps Earth orbiting the sun?

• Solar flares

• Magnetic fields

• Gravity

• Wind

Why is gravity considered a mysterious force?

• Because it is visible

• Because it is weak

• Because it is unpredictable

• Because it cannot be seen