Physics

Question 1

The inertia of a body is determined by its ______________, change in altitude (do / do not) affect inertia.

Answer 1

• Mass.
• Do Not.

Question 2

When a helicopter climbs at increasing airspeed, it’s inertia (dose / dose not) change but it’s momentum (increases / decreases / remains constant).

Answer 2

• Dose Not.
• Increases.

Question 3

When the mass of air through a rotor system becomes less, the downward acceleration must be (greater / smaller) to provide the same opposing force to weight.

Answer 3

• Greater.

Question 4

When a helicopter is in a steady rate turn at a constant airspeed, the aircraft (is / is not) accelerating because it is constantly changing its __________________.

Answer 4

• Is.
• Direction.

Question 5

During a constant-radius/steady rate turn at a constant airspeed, all acting on the helicopter (are / are not) balanced and the aircraft (is / is not) in equilibrium.

Answer 5

• Are.
• Is Not.

Question 6

Ignoring fuel burn-off, an aircraft continues to gain altitude, its mass (dose / dose not) vary, the earth’s attraction force becomes (stronger / weaker) and the aircraft’s weight becomes (less / more).

Answer 6

• Dose not.
• Weaker.
• Less.

Question 7

Assuming the mass of an aircraft and its airspeed remain constant, the centripetal force required to turn it on a reducing radius must be (greater / smaller).

Answer 7

• Greater.

Question 8

A couple consists of _________ equal, parallel and opposite forces and when these forces act around a point equal distance between the forces, the couple tends to produce _____________.

Answer 8

• Two.
• Rotation.

Question 9

The strength of a moment is (increased / decreased) when the leaver arm increases.

Answer 9

• Increased.

Question 10

Assuming your helicopter has a constant mass, it’s kinetic energy (doubles / quadruples) when it’s airspeed doubles.

Answer 10

• Quadruples.