PHYSICS FORMULAS
|
Unknown Quantity |
Known Quantities | Formulas |
| average velocity (speed) | distance, time |
Vave =d / t |
| distance | average velocity, time |
d=Vave x t |
| time | average velocity, distance |
t=d / V ave |
| acceleration | final velocity, time , initial velocity |
a=Vf -Vi |
| final velocity | acceleration, time |
Vf=at |
| distance | acceleration |
d=1/2at2 |
| distance (free fall) | gravity acceleration, time |
d=1/2gt2 |
| force | mass, acceleration |
F=ma |
| average velocity | final and initial velocity |
Vave =Vi + Vf |
| momentum | weight, velocity |
M= wv |
| velocity (speed) | distance,time |
V=d/t |
| potential energy | mass (n), height (m) |
P.E.= mh |
| kinetic energy | mass, velocity |
K.E. = 1/2mv2 |
| ideal mechanical advantage | distance due to effort, resistance |
IMA=de/dr |
| actual mechanical advantage | resistance, effort |
AMA=R / E |
| work input | effort, distance due to effort |
W.I. =E x de |
| work output | resistance, distance due to resistance |
W.O. = R x dr |
| efficiency | work input and output |
Eff=WO x 100 |
| work done against friction | work output and input | Wf = W.I.-W.O. |
| friction force | work done, length |
f=Wf / l |
| power | work, time |
P= w / t |