Four Forces of Flight

Lift

100

Lift makes the plane go _____. a) down b) faster c) up

c) up

200

Without lift, the plane would a) fly into space b) fall out of the sky c) go too fast

b) fall out of the sky

300

To create lift, air needs to blow... a) under the wing b) over the wing c) over & under the wing

c) over & under the wing

400

Bernoulli's Principle says that lift = low pressure above the wing and _____________ below the wing. a) low pressure b) fast air c) high pressure

c) high pressure

Gravity

100

Gravity keeps the plane to a) Earth b) space c) water

a) Earth

200

Without gravity, the plane would .... a) go way too fast b) go way too slow c) fly into space

c) fly into space

300

To keep the plane to Earth, gravity .... a) pushes down on the plane b) pushes up on the plane

a) pushes down on the plane

400

For a plane to fly, you need ... a) just gravity b) all 4 forces at the same time c) gravity, thrust, and lift

b) all 4 forces at the same time

Drag

100

Drag makes the plane go ______. a) slower b) up c) down

a) slower

200

Without drag, the plane would ..... a) go way too fast b) fall out of the sky c) fly into space

a) go way too fast

300

To increase drag a) add more power b) make the plane smaller c) increase surface area

c) increase surface area

400

If a plane did not have drag, I could... a) change the shape b) add a parachute to the back c) blow air against it d) all of the above

d) all of the above

Thrust

100

Thrust makes the plane go _____. a) forward b) backwards c) slower

a) forward

200

Without thrust, the plane would .... a) go too slow b) fly in circles c) fly into space

a) go too slow

300

Thrust comes from a) a power source b) wind c) drag

a) a power source

400

To increase thrust, a) make a bigger engine b) give it more power c) turn the propeller more d) all of the above

d) all of the above