Physics Flashcards
(21 cards)
What is the equation for weight
Weight(n)=mass(kg) x gravitational field strength(n/kg)
What is the equation for gravitational field strength
Gravitational field strength(n/kg) = weight(n) divided by mass(kg)
What is the equation for mass
Mass(kg)=weight(n) divided by gravitational field strength (n/kg)
What is the equation for work done
Work done(j)= force(n) x distance (m)
What is the equation for distance
Distance(m)=work done(j) divided by force (n)
What is the equation for force
Force (n)= work done (j) divided by distance (m)
What is the equation for GPE
GPE=mass(kg) x gravitational field strength (n/kg) x change of height (m)
What’s the equation for change in height
Change in height(m)=GPE divided by mass x gravitational field strength
What is the equation for efficency
Efficency = useful output divided by total input
What is the equation for kinetic energy
Ke = 0.5 x mass x velocity squared
What is the equation for power
Power = work done divided by time
What is the equation for mass
Mass= Ke divided by velocity squared
What is work done
Energy transferred
Can energy be used up or destroyed
No
What are the 8 energy stores
Thermal, kinetic energy
Gravitational potential
Elastic potential
Chemical, magnetic
Electrostatic
Nuclear
What is a closed system
Where neither matter or energy can leave
One way of transferring energy
Heating
What energy is transferred when something falls
Gravitational potential to kinetic energy
What does specific heat capacity mean
How hard it is to heat something up
How is power measured
Watts
