Flashcards in Key equations Deck (14):
Average speed =
Distance / time
Average speed x time
And another version which starts with v^2 - u^2 = ...
Change in velocity / time taken
V^2 - u^2 = 2 x a x X
X stands for distance
What is Newton’s second law? The equation for force?
F=m x a
Mass x gravitational field strength
W = m x g
What is Earths gravitational field strength?
Mass (kg) x velocity
P = m x v
Change in gravitational potential energy (Joules)=
Mass x gravitational field strength x change in vertical height
^GPE = m x g x ^h
Kinetic energy (Joules) =
1/2 x m x v^2
Useful energy transferred / total energy supplied
Wave velocity =
State both equations
Wave velocity = frequency x wavelength
Wave velocity = distance / time
What is the equation for force which includes momentum ?
Force = change in momentum / time
F = (mv - mu) / t
What is the equation for work done?
Work done = force x distance