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Flashcards in Mechanical, Physics & Science Deck (48)
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1

What are Newton’s three laws of motion?

1. Inertia
2. Acceleration
3. Action/Reaction

2

What is the Bernoulli Principle?

Bernoulli's Principle states that faster moving air has low air pressure and slower moving air has high air pressure. The difference in air pressure cause lift.

3

How does the Bernoulli Principle correlate with the Airspeed Indicator (ASI)?

It's used to calibrate the airspeed indicator (ASI) so that it displays the indicated airspeed appropriate to the dynamic pressure.

4

Who is Daniel Bernoulli?

A Swiss mathematician and physicist

5

What is Newton's 1st law of motion (Inertia)?

An object at rest tends to remain at rest. An object in motion tends to remain in motion unless acted upon by an outside force.

6

What is Newton's 2nd law of motion (Acceleration)?

Force applied to overcome inertia of an object. The greater the mass of the object the greater force required to produce a particular acceleration.

7

What is Newton's 3rd law of motion (Action/Reaction)?

For every action there is an equal or opposite reaction.

8

What are four forces that act upon an aircraft in flight?

- Lift
- Gravity (aka weight)
- Thrust
- Drag

9

Our atmosphere is composed of what?

78 percent Nitrogen; 21 percent Oxygen; 1 percent other gas elements (i.e. argon, helium)

10

What is the weight of the atmosphere at sea level?

14.7 pounds

11

Which air is denser? Warm or cold?

Warmer air is less dense that cooler air; produces less lift.

12

How is Newton's 2nd Law of Motion calculated?

Force = Mass x Acceleration

13

What is centripetal force?

Center seeking force

14

What is centrifuged force?

Acts opposite to centripetal force and helps maintain tension

15

What is gravity?

Pull of the earth on all bodies on earth

16

What is the mass of the earth?

6 x 10^24 kg

17

What is the force or pull of earth?

9.8 N

18

How is weight calculated?

Weight = Mass x acceleration due to gravity

19

What unit of measure for mass and weight?

Mass = Kilograms
Weight = Newton

20

What is Center of Gravity?

Point of a body through which the weight of the body acts

21

What is torque?

Product of force and moment arm. Causes rotation of a body about a point called the pivot or fulcrum.

22

What is torque calculated?

Torque = Force x perpendicular distance from the pivot

23

Without friction what happens?

A body moving with uniform velocity will continue moving with the same velocity until stopped by an external force.

24

What are the two types of friction?

Static & Kinetic

25

What is static friction?

Friction applied by a body at rest in friction to a force attempting to move it.

26

What is kinetic friction?

Once a body is set in motion and no longer experiences static friction.

27

What is the law of conservation of energy?

Energy can neither be created, nor be destroyed, but it can only change from one form to another.

28

One joule is equal to what?

1 Nm

29

How is Potential Energy calculated?

Potential Energy = mass x acceleration due to gravity x height = mgh

30

How is kinetic energy calculated?

Kinetic Energy = 1/2 x mass x (velocity of the body)^2 = 1/2mv^2