I WONDER - How Does Gravity Work?

The video tutorial explains gravity as the force pulling objects toward each other on Earth, giving them weight and causing them to fall at an acceleration of 9.81 m/s². It describes freefall as the state when only gravity acts on an object, and notes that without air resistance, all objects fall at the same rate regardless of mass. This concept was demonstrated by astronaut David Scott on the moon, where he dropped a feather and a hammer, both hitting the surface simultaneously due to the lack of atmosphere.

What is the acceleration due to gravity on Earth?

• 7.81 metres per second squared

• 8.91 metres per second squared

• 9.81 metres per second squared

• 10.81 metres per second squared

What happens to an object in freefall?

• It is affected by air resistance

• It moves upward

• It stops accelerating

• It is only influenced by gravity

In the absence of air resistance, how do objects in freefall behave?

• They do not accelerate

• Lighter objects fall slower

• Heavier objects fall faster

• They accelerate at the same rate regardless of mass

Who demonstrated the concept of freefall on the moon?

• Yuri Gagarin

• David Scott

• Neil Armstrong

• Buzz Aldrin

What objects did David Scott use to demonstrate freefall on the moon?

• A ball and a book

• A rock and a leaf

• A coin and a feather

• A feather and a hammer