Understanding Gravity, Air Resistance, and Parachutes

The video explains how gravity pulls objects towards Earth, causing them to accelerate until air resistance balances the gravitational force, reaching terminal velocity. For humans, this speed is too high for a safe landing, so parachutes are used to increase air resistance and slow descent. The video encourages viewers to design their own parachutes and provides resources for further learning.

What force causes an object to accelerate as it falls towards the Earth?

• Nuclear force

• Gravitational force

• Magnetic force

• Frictional force

What happens when air resistance equals the force of gravity on a falling object?

• The object falls upwards

• The object stops moving

• The object continues to accelerate

• The object reaches terminal velocity

Which factor does NOT affect the terminal velocity of an object?

• Color

• Shape

• Mass

• Size

What is the approximate terminal velocity of a human falling through the air?

• 60 miles per hour

• 240 miles per hour

• 120 miles per hour

• 180 miles per hour

How does a parachute help a skydiver land safely?

• By reducing the skydiver's mass

• By decreasing air resistance

• By increasing gravitational force

• By increasing air resistance

What is the primary purpose of a parachute?

• To change direction

• To increase speed

• To decrease air resistance

• To increase air resistance

What should a skydiver do after reaching terminal velocity to ensure a safe landing?

• Remove their parachute

• Deploy their parachute

• Increase their speed

• Change their body position

What activity is suggested to help understand the concept of air resistance?

• Creating a wind tunnel

• Building a model rocket

• Making a parachute for small objects

• Designing a paper airplane

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• By visiting a local library

• By subscribing to the channel

• By purchasing them online

• By creating a free account at ngscience.com

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