Physics Formula Flashcards
What is the formula for kinetic energy?
Ek = 0.5 x mass x speed^2
Ek = 0.5mv²
What does GPE stand for and how is it calculated?
GPE = mass x gravitational field strength x height
GPE = mgh
How is work done calculated?
Work done = energy transferred
Work done = force x distance
What is the formula for power?
Power = useful energy output / time taken
P = W/t
How is efficiency defined?
Efficiency = useful energy output / total energy input
Efficiency can also be calculated for power.
What is the equation for elastic potential energy?
Elastic potential energy = 0.5 x spring constant x (extension)^2
Ee = 0.5kΔx²
How is energy transferred calculated?
Energy transferred = power x time
E = Pt
What is the formula for density?
Density = mass / volume
p = m/V
What does magnification represent?
Magnification = image height / object height
M = h_image / h_object
What is the equation for weight?
Weight = mass x gravitational field strength
W = mg
How is work done calculated in terms of force and distance?
Work done = force x distance
W = Fs
What is the formula relating force, spring constant, and extension?
Force = spring constant x extension
F = kx
What is the equation for distance travelled?
Distance travelled = speed x time
S = vt
How is acceleration calculated?
Acceleration = change in velocity / time taken
a = (v - u)/t
What is the equation for resultant force?
Resultant force = mass x acceleration
F = ma
What is the formula for momentum?
Momentum = mass x velocity
p = mv
What is the equation connecting final and initial velocity with acceleration and distance?
(final velocity)^2 - (initial velocity)^2 = 2 x acceleration x distance
v² - u² = 2as
How is change in momentum calculated?
Change in momentum = force x time taken
F = Δp/t
