Understanding Free Fall and Gravity

What is the primary force causing objects to fall in free fall?

• Magnetism

• Air resistance

• Friction

• Gravity

In the Apollo mission experiment, what was demonstrated about objects of different weights?

• Objects fall at the same rate in the absence of air

• Lighter objects fall faster

• Objects do not fall on the moon

• Heavier objects fall faster

What did Galileo predict about a rock and a feather falling in a vacuum?

• They would fall at the same rate

• The feather would fall faster

• They would not fall at all

• The rock would fall faster

What is the approximate acceleration due to gravity on Earth?

• 20 meters per second squared

• 5 meters per second squared

• 9.8 meters per second squared

• 15 meters per second squared

How does air resistance affect a falling object?

• It makes the object heavier

• It speeds up the object

• It has no effect

• It slows down the object

What happens to a skydiver's speed when they spread out their body?

• They fall slower

• Their speed remains constant

• They stop falling

• They fall faster

What is terminal velocity?

• The maximum speed an object can reach in free fall

• The speed at which an object stops falling

• The speed at which air resistance is zero

• The speed at which gravity no longer acts

Why do skydivers curl into a ball during free fall?

• To slow down

• To fall faster

• To increase air resistance

• To stop falling

What is the relationship between gravity and air resistance at terminal velocity?

• Gravity is stronger than air resistance

• Air resistance is stronger than gravity

• They are equal

• There is no relationship

What is the significance of Galileo's experiment on the moon?

• It confirmed that air resistance is necessary for falling

• It proved that heavier objects fall faster

• It showed that objects fall at the same rate in a vacuum

• It demonstrated that the moon has no gravity