What is Terminal Velocity? How Do We Find It?

The video explores the concept of free fall, emphasizing the role of air resistance. It explains how drag affects acceleration and introduces terminal velocity. Through an experiment with coffee filters, the video illustrates these concepts and discusses measurement uncertainty. It concludes with a comparison of terminal velocities between a baseball and coffee filters, and introduces numerical modeling for future lessons.

What is the only force acting on an object in true free fall?

• Magnetic force

• Friction

• Gravity

• Air resistance

What additional force acts on an object moving through air, preventing true free fall?

• Normal force

• Drag

• Buoyant force

• Tension

How is the net force on an object in free fall calculated?

• Drag force minus gravitational force

• Gravitational force minus drag force

• Sum of drag and gravitational forces

• Difference between normal and gravitational forces

What happens to the acceleration of an object as it reaches terminal velocity?

• It increases

• It decreases to zero

• It remains constant

• It becomes negative

What is the terminal velocity of the five stacked coffee filters?

• 42 m/s

• 9.81 m/s

• 3.3 m/s

• 0 m/s

Why does the acceleration graph of the coffee filters appear scattered?

• Due to measurement noise

• Because of constant acceleration

• Because the filters are not moving

• Due to incorrect data collection

Why was a baseball not used instead of coffee filters in the experiment?

• Baseballs are too small

• Baseballs have a higher terminal velocity

• Baseballs are too light

• Baseballs are not affected by drag

What is the terminal velocity of a baseball?

• 90 m/s

• 42 m/s

• 9.81 m/s

• 3.3 m/s

What is numerical modeling used for in physics?

• To simplify equations

• To eliminate measurement noise

• To predict motion including drag

• To measure exact values

How high must a baseball be dropped to get close to its terminal velocity?

• 100 meters

• 200 meters

• 400 meters

• 600 meters