Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
23 Cards in this Set
- Front
- Back
|
Displacement
|
Distance in a given direction.
|
|
|
Velocity
|
The rate of change of displacement.
|
|
|
Acceleration
|
Rate of change of velocity.
|
|
|
Newton’s first law of motion |
A body’s velocity does not change unless a force acts on it. |
|
|
Newton’s second law of motion |
The rate of change of a body’s momentum is proportional to the force acting on it and takes place in the direction of the force. |
|
|
Newton’s third law of motion |
Every action ha an equal and opposite reaction. |
|
|
Force |
A force is anything that changes an objects velocity. |
|
|
Momentum |
mass x velocity |
|
|
Couple |
Two forces that have a turning effect only |
|
|
Conservation of momentum |
In an interaction in a closed system, the total momentum is constant.
|
|
|
Conditions for equilibrium |
The algebraic sum of the forces is zero. The algebraic sum of the moments is zero. |
|
|
Power |
rate at which work is done |
|
|
Energy |
The ability to do work. |
|
|
Principle of conservation of energy energy |
Energy cannot be created or destroyed but is changed from one form to another.
|
|
|
Centripetal force |
the force towards the centre on an object in a circular path. |
|
|
Angular velocity |
The rate of change of angular displacement. |
|
|
Newton’s law of gravitation |
The force between 2 point masses is proportional to the product of the masses and inversely proportional to the square of the distance between them. |
|
|
Weight |
The pull of gravity.
|
|
|
Density |
The mass of unit volume |
|
|
Pressure |
The force per unit area. |
|
|
Moments |
The turning effect of a force. |
|
|
Work |
This is done when a force moves an object.
|
|
|
Mass
|
The amount of matter in an object.
|
