Understanding Terminal Velocity

The video explains terminal velocity, where a falling object's velocity becomes constant due to balanced forces. Initially, only gravity acts on the object, causing it to accelerate. As it falls, air resistance increases, reducing acceleration until it equals the gravitational force, reaching terminal velocity. Opening a parachute increases air resistance, reducing terminal velocity. The video concludes with a recap of these concepts.

What force acts on a person immediately after they step out of an airplane?

• Weight

• Buoyancy

• Air resistance

• Magnetic force

What causes air resistance to act on a falling person?

• Collisions with air particles

• Gravitational pull

• Magnetic fields

• Buoyant force

Which factor does NOT affect the size of air resistance?

• Mass

• Number of collisions with air particles

• Surface area

• Velocity

What happens to the resultant force as air resistance increases?

• It increases

• It remains constant

• It reverses direction

• It decreases

What does a less steep slope on a velocity-time graph indicate?

• Constant velocity

• Increasing acceleration

• Decreasing acceleration

• Increasing velocity

When does a falling person reach terminal velocity?

• When air resistance is greater than weight

• When weight equals air resistance

• When there is no air resistance

• When weight is greater than air resistance

What effect does opening a parachute have on a falling person?

• Decreases surface area

• Increases air resistance

• Decreases air resistance

• Increases weight

What happens to the resultant force when a parachute is opened?

• It acts upwards

• It becomes zero

• It acts downwards

• It remains constant

What is the new terminal velocity after opening a parachute compared to before?

• Lower

• Zero

• The same

• Higher

What happens to the air resistance as a person slows down after opening a parachute?

• It becomes zero

• It remains constant

• It decreases

• It increases