kinetic and potential enerygy store Flashcards
1
Q
what requires work
A
lifting objects in a gravitational field
2
Q
what does the amount of energy stored depend on
A
mass,height and strength
3
Q
how do you find the change in energy or gravitational potential energy
A
mass x gravitational field strength x height
4
Q
what happens when something falls with air resistance
A
Gravitational potential energy is transferred to it’s kinetic energy store
air resistance acts against the falling object
some of its energy is transferred into other energy stores
5
Q
what happens when an object is falling without air resistance
A
energy lost from the gravitational potential energy store equals energy gained in kinetic energy store
6
Q
how do you calculate elastic potential energy
A
0.5 x spring constant x (extension)2
