physics chapter 1- conservation and dissipation of energy
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30 Terms
name examples of chemical energy stores
fuels, food, and chemicals found in batteries
what is kinetic energy
the energy an object has because it is moving
what is gravitational potential energy
energy stored in an object because of its position above such as an object above the ground
what is elastic potential energy
the energy stored in a springing object when you stretch or squash it
what is thermal energy
energy a substance has because of its temperature
what happens in terms of energy stores when a object falls from a height
the gravitational potential energy decreases whilst the kinetic energy increase
what is the conservation of energy
energy can not be created nor destroyed
what energy transfers happen to a bungee jumpers after jumping off a platform
when the rope is slack energy is transferred from the gravitational potential energy stores to the kinetic energy store as the jumper accelerates towards the ground due t the force of gravity
when the rope tighten, it slows the bungee jumpers fall. the jumpers kinetic energy store decreases and the ropes elastic potential energy store increase as the rope stretches . eventually the jumper comes to a stop, the energy that was originally in the kinetic energy store of the jumper comes to a stop, the energy that was originially in the kinetic energy store of the jumper has all been tranfered into the elastic potential
what is work done
when a force makes the object move
what is work done messured in
joules
what is force applied messured in
newtons
what is distance moved messured in
meters
does gravitonal energy increases as the object is raised
when an object is raised the gpe increase
why does the gpe increase when an object is lifted
becasue work is done on it to overcome hte gravitonal force
what is change in gravitational potential measured in
joules
what is weight measured in
newtons
what is change of height measured in
meters
what does kinetic enegy depend on
the object moving mass and speed
what is kinetic energy measured in
joules
what is mass measured in
kilograms
what is speed/ velocity
m/s ^2
what is elastic potential energy measured in
joules
what is spring constant measured in
newtons per meter
what is extension measured in
meters
what is useful energy
the energy in the place we want it in the form we need it
what is waste energy
is the energy that is not useful energy and is transferred by undesired pathway, it is eventually transferred to the surrounding which becomes warmer
what happens when energy become disspated
less usefull
why do machines waste energy
because of fricction ebtweeen their moving parts air resistance elcttila resistnace and noise
which energy supplies are most used in the home
electricity gas and oil
what is power
the rate of transfer of energy