key equations Flashcards
1
Q
speed
A
speed = distance ÷ time
s=d÷t
2
Q
acceleration
A
acceleration = force ÷ mass A=F÷m or acceleration = (final speed - initial speed) ÷ time A=(s²-s¹)÷t
3
Q
weight
A
weight = mass x gravity
w=mxG
4
Q
momentum
A
momentum = mass x velocity P = mxV force = change in momentum ÷ time f = (m²-m¹)÷t
5
Q
work done
A
work done = force x distance
W=fxd
6
Q
kinetic energy
A
kinetic energy = ½ x mass x velocity²
KE=0.5xMxV²
7
Q
kinetic energy
A
kinetic energy = ½ x mass x velocity²
KE=0.5xMxV²
8
Q
change in momentum
A
force = (final momentum - initial momemtum) ÷ time
f=(M²-M¹)÷t
9
Q
wave velocity
A
speed = frequency ÷ wavelength
V=F÷λ
