Equations Flashcards
What is the equation for WEIGHT?
Weight(N)= mass(kg) x gravitational field strength
What is the equation for WORK DONE?
Work done (J) = force(N) x distance (along the line of action of the force)(m)
What is the equation for FORCE ON A SPRING?
Force applied onto a spring(N) = spring constant x extension(m)
What is the equation for MOMENT OF A FORCE?
moments
Moment of a force(Nm) = force(N) x distance(M)
What is the equation for PRESSURE?
pressure(Pa)= force normal to a surface/area of that surface
What is the equation for DISTANCE TRAVELLED?
Distance travelled(m) =speed(m/s) x time(s)
What is the equation for ACCELERATION?
Acceleration(m/s squared)=final velocity - initial velocity(change in velocity) (m/s) / time taken (s)
What is the equation for RESULTANT FORCE?
Resultant force(N)=mass(kg) x acceleration(m/s squared)
What is the equation for MOMENTUM?
Momentum(kg.m/s)= mass(kg) x velocity(m/s)
What is the equation for KINETIC ENERGY?
Kinetic Energy(J) = 0.5 x mass x (speed)*2
What is the equation for GRAVITATIONAL POTENTIAL ENERGY?
gravitational potential energy(J) = mass(kg)× gravitational field strength × height(m)
What is the equation for POWER?
power(W) = energy transferred(J)/time(s) power = work done / time (s)
What is the equation for EFFICIENCY?
efficiency =
useful output energy transfer/total input energy transfer
efficiency =
useful power output/total power input
What is the equation for WAVE SPEED?
wave speed = frequency × wavelength
What is the equation for DENSITY?
Density=Mass/volume
