Mechanics of flight Flashcards
Define Newtons first law of motion
A body that is at rest, tends to remain at rest. A body that is moving, tends to continue moving - at the same rate and in the same direction, unless acted upon by an external force.
Define Newtons second law of motion
When a force is exerted on a body to change its state of rest or uniform motion, the acceleration so produced is proportional to the applied force and acts in the same direction
Define Newtons third law of motion
To every action there is an equal and opposite reaction
Mass is the?
Quantity of matter a body or object contains
Gravity is?
The attraction between two masses.
Inertia is?
the latin word for inaction or laziness.
Inertia is measured in terms of?
Mass
The mass of a body is the measure of how?
Difficult it is to stop or start
The two quantities that determine the difficulty in starting a body up from rest to a given velocity or stopping the body from a given velocity to rest?
Mass and it’s velocity
The product of mass and velocity is called?
Momentum
Momentum =
M x V
Speed is?
Metre per second, or feet per second.
Acceleration is?
the rate of change of velocity with time, metres per second per second
Force =
Mass x Acceleration
The force of attraction between any two bodies is known as?
weight
Define “work”
Work is the exertion of a force over a given distance and is defined as the product of the force multiplied by the distance
Work =
F(force) x S (distance)
Power is?
Work done in a unit of time, expressed as joules
Power =
F x S / T
Potential energy =
Mass x Gravity x Height
Potential energy =
Mass x Gravity x Height
Kinetic Energy =
1/2 MV squared
Dynamic pressure is?
the pressure exerted due to the motion of the air and is proportional to the density and the velocity squared
Dynamic pressure formula is?
1/2 rho v^2
Gravity acceleration value is -
9.8 metres per second per second
If acceleration higher than 9.8 metres per second per second is experienced, what will be the effect?
the amount of gravity felt will increase
