The video tutorial explains the concept of lift force using Bernoulli's principle. It demonstrates how to calculate the lift force generated by wind over a house and an airplane. The tutorial covers the pressure differences created by varying wind speeds and how these differences result in lift. It also explains the net vertical force acting on an airplane by considering both lift and weight forces.

What is the initial wind speed mentioned in the problem of calculating lift force over a house?

• 45 meters per second

• 30 meters per second

• 75 meters per second

• 60 meters per second

According to Bernoulli's principle, what happens to pressure when the velocity of a fluid increases?

• Pressure fluctuates

• Pressure decreases

• Pressure increases

• Pressure remains constant

What is the relationship between pressure and force as described in the video?

• Pressure is force divided by area

• Pressure is force times area

• Pressure is force minus area

• Pressure is force plus area

What is the density of air used in the calculation of lift force for the house?

• 1.00 kg/m³

• 1.50 kg/m³

• 1.20 kg/m³

• 1.29 kg/m³

What is the wing area of the airplane mentioned in the video?

• 25 square meters

• 20 square meters

• 15 square meters

• 30 square meters

What is the wind speed at the top surface of the airplane's wings?

• 80 meters per second

• 70 meters per second

• 90 meters per second

• 60 meters per second

What is the wind speed at the bottom surface of the airplane's wings?

• 55 meters per second

• 60 meters per second

• 65 meters per second

• 70 meters per second

What is the calculated lift force acting on the airplane?

• 28,057.5 newtons

• 30,000 newtons

• 25,000 newtons

• 20,000 newtons

What is the net vertical force acting on the airplane?

• 12,000 newtons

• 16,297.5 newtons

• 18,000 newtons

• 14,000 newtons

What is the mass of the airplane used in the calculation?

• 1000 kilograms

• 1100 kilograms

• 1300 kilograms

• 1200 kilograms