Kinetic and Potential Energy Flashcards
what does kinetic energy depend on?
mass and speed
what is the formula for kinetic energy?
Ek = 0.5 x mass x velocity^2
what is gravitational potential energy?
gravitational potential energy is the energy stored in an object when you raise it to a height against gravity
what is the formula for potential energy?
Ep = mass x gravitational field strength x change in height
what is the formula for falling objects
kinetic energy gained = potential energy lost
this is bc of this principle of conservation of energy
what is potential energy?
stored or hidden energy. potential means ‚,containing power‘
rule for work done and gpe
gain in gpe = work done on that object against gravitya
how do batteries work?
a rechargeable battery is recharged by passing an electric current through it. the electrical energy that is transferred to the battery by the electric current is stored as chemical potential energy
what energy transfer is there when an object is in motion?
the kinetic energy of the motion is transferred to thermal energy and a small amount of sound energy
in an energy transfer….
the energy at the start must add up to the energy transferred and released at the ends
when you throw an object….
a small amount of thermal energy is lost due to friction between stone and the air
