Topic 1 - Forces Flashcards
What is conservation of energy?
Energy can neither be created nor destroyed, but may be transferred (converted) from one form to another
What’s a sankey diagram?
These diagrams represent energy transfers. The width of the arrows represent the quantity of energy.
What’s Kinetic Energy?
This is the energy in an object due to its motion
What does KE depend on?
A) the mass of the object
B) the speed of the object
How do you calculate KE?
KE=1/2mv^2
What’s the unit for mass?
Kg
What’s the unit for velocity?
m/s
What’s Gravitational Potential Energy?
This is the energy of an object due to its height above the surface of the Earth.
What does GPE depend on?
A) mass
B) height
C) the gravitational field strength (g)
How do you calculate GPE?
GPE=mgh
What is g measured in?
10N/kg
How do you calculate Work Done?
Work done=forcexdistance moved in the direction if the force (W=Fd)
What’s Work Done?
Work is done when a force moves it’s point of application. It is equal to the energy transferred in the process.
What is F measured in?
N
What is d measured in?
m