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yr 10 science test 2

What is kinetic energy

kinetic energy is energy stored in moving objects

what must kinetic energy have

mass (m) and speed (v)

what is potential energy

energy that is stored in an object due to its postition

what happens when kinetic energy is lost

it will equal the potential energy gained

what happens when potential energy is lost

it will equal the kinetic energy gained

what is work and an example

whenever work is done energy is transferred ex. walking up stairs

what is weight

the force of gravity acting on a mass

what is work measured in

Joules (j)

what is newtons first law

an object remains in a constant state of motion unless acted on by and external unbalanced force

What is newtons second law

when an object expericences an unbalanced external force, it will undergo acceleteration ( a change in velocity) depandant on the mass of the object and the size of the force

what is newtons third law

for every force applied on a mass, the mass exerts an equal but opposite reaction force

what are the 5 types of energy

kientic, potential,electrical, light and sound

what are the 4 types of potential energy

gravitational, elastic, kinetic, chemical

what is gravitational potential energy

the energy aquired by an object due to a change in it's position when it is present in a gravitional field

what is elastic potetional energy

energy started as a result of applying a force to deform an elastic object

what is chemical potential energy

energy stored in the bonds of atoms and molecules

what is kinetic potential energy

energy that a moving object has due to its motion is kinetic energy

what is eletrical energy

the movement of an electrical charge and is the result of the interaction of subatomic particles

what is light energy

is an electromagnetic radiation of a particular wave length that is visible to the human eye

what is sound energy

it is the energy produced by sound vibrations which cause waves of pressure

what is the law conservation of energy

energy cant be created or destroyed only transformed

what is energy transformation

an energy transformation is the change of energy from one form to another

example of an energy tranformation

heat energy to kinetic energy

what is the efficency of energy transformations

the ratio between the useful output of an energy conversion machine and the input in energy terms

what is force

force is a push or pull extered on one object by another

what is acceleration and an example

the rate of change of velocity(speed) in a object
walking down the street

what is net force

the effect of all the pushing a pulling forces

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