physics 🔬🩸
kinetic energy
the energy store found in moving objects, not just the particles inside it
what does the amount of kinetic energy in an object depend on
the mass of the object and how quickly it is moving
kinetic energy equation
ek = (m x v^2) / 2
kinetic energy equation
mass x speed) \ 2
weight
force of gravity acting on a mass
weight equation
weight (n) = mass (kg) x gravitational field strength (n/kg)
gravitational potential energy
store of energy in objects due to their position in a gravitational field
gpe equation
gpe (j) = mass (kg)x gravitational field strenghth (n/kg)
gravitational potentail energy equation
Ep = mgh
the law of conservation of energy
the total amount of energy in a closed system remains constant
power is
how much energy us transferred in a given time. the rate at which energy is transferred or work is done
power equation
joules (E) / seconds (T)
power equation
work done / time
efficiency
a measure of how much useful energy js transferred