P1 Flashcards
What are the energy stores
Chemical
Kinetic
Gravitational potential
Elastic potential
Thermal
How can energy be tranferred
Heating
Waves
Electric current
What does the law of conservation of energy state
Energy cannot be created or destroyed
What is a closed system
Object or group of objects in which no energy transfers take place out of or into energy stores of the system
Draw diagrams of energy stores changing
Eg chemical to kinetic
What is work done
When a force moves an object, energy is transferred to the object
When does gravitational potential energy increase
An object is moved upwards
What is gravitational field strength of the moon
1/6 of the earths
What do all moving objects have
Kinetic energy
What is elastic potential energy
Energy stores in an elastic object that has been stretched or squashed
What happens to dissipated energy
It will be transferred to its surrounding warming them up slightly
What happens to wasteful energy
It will become less useful and less useful
What is input energy
Energy supplied to a device
What makes a machine more efficient
The less energy the machine wastes
Give some ways a machine wastes energy
-Friction between moving parts
-Air resistance
