Jetpack Physics and Thrust Principles

What fundamental physics principle explains how expelling a fluid can generate thrust for hovering?

• Newton's First Law of Motion

• Newton's Second Law of Motion

• Newton's Third Law of Motion

• Law of Conservation of Energy

Approximately how much milk would an average person need to expel per second to achieve hovering, according to rocket science principles?

• 1 gallon

• 2 gallons

• 5 gallons

• 10 gallons

A jetpack operates by expelling a high-velocity stream of fluid downwards. This action generates an upward force that lifts the wearer. What is this upward force called?

• Drag

• Lift

• Thrust

• Weight

If a superhero needed to use a super-dense liquid for propulsion, which property of the liquid would be most critical for generating significant thrust with a smaller volume?

• Viscosity

• Temperature

• Density

• Specific heat capacity