Physics definitions Flashcards
What is displacement
A measure of the distance but also with a direction
What is mass?
A measure of how much matter makes up an object
What is weight?
The force of gravity pulling an object towards the centre of the planet
What is mass measured in
Kg
What are newtons measured in
N
What is the rule for the extension of a spring
The extension of a spring is directly proportional to the force applied, provided the limit of proportionality is not exceeded
What does the spring constant tell u
How much force is needed to extend a spring by 1 m
The higher the spring the constant the stiffer the spring, true or false
True
8 types of energy
Nucleur
Electromagnetic
Thermal
Kinetic
Elastic
Gravitational potential
Chemical
Vibration
Energy cannot be ? or ?, it can only be ? between different energy stores
Created, destroyed, transferred
Energy can move between energy stores by which 4 different pathways
Mechanical working (force)
Electrical working (circuits)
Heating ( by particles) - conduction and convection
Radiation (light and infrared)
What is work done?
The measure of how much energy is transferred by mechanical working
What is power
The rate at which work is done/ energy is transferred
What is current determined by?
The potential difference across components and the resistance o f the components
The larger the potential difference the ? The current
Higher
The higher the resistance the ? the current
Lower
What are vector quantities
Quantities that have magnitude and direction
What is velocity
Speed in a given direction
In a distance time graph what does a flat horizontal line mean
The object is stationary
In a distance time graph what does a sloping up or sloping down line mean
It means ig is accelerating or decelerating
What does a straight line upwards or downwards mean?
It means the object is moving at a constant speed
In a velocity time graph what does a straight horizontal line mean?
It means the object is moving at a constant speed
In a velocity time graph what does a straight line upwards or downwards mean?
It means the object is accelerating or decelerating
What is acceleration
The rate of change of velocity