Lift

When lift force is greater than the weight force, the plane will accelerate...

• Upwards

• Downwards

• Forward (Left)

• Backwards (Right)

The aeroplane is flying level at constant altitude. Which two forces must be the same?

• Thrust and Drag

• Thrust and Lift

• Lift and Weight

• Weight and Drag

The aerofoil shape of a plane's wing uses the...

• Doppler Effect

• Mass Effect

• Bernoulli Effect

• Ground Effect

The hot air in the balloon floats above the cool air in the room because it is...

• More dense

• Less dense

• Lighter

• Heavier

This balloon was flying level at constant altitude, then these forces were applied. What happens next?

• The balloon rises

• The balloon continues at constant altitude

• The balloon falls

When we test our balloons (or plane wings) we try to test them more than once. This is because...

• Repeated tests makes the experiment more accurate

• Repeating the test makes the results reliable, so it's easier to spot chance anomalies.

• Repeating the test makes it easier to draw a good graph