If you find that the numbers you have do not match any of the quantities in the formula you have you will need to either use a different formula if you can find one or to use a formula to convert the quantities you have into those you want.
for example if i knew an object's ( lets make it a tank) weight on earth and wanted to know how much force it would exert on a 1 kg mass if they were alone together far away from any other massive objects I would start by dividing the weight of the tank by the force per mass on an object at earth's surface to get the mass and then use newtons gravitational law to find the force using the mass I have found.
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Physics, despite it's reputation is an amazing science and with not as much effort as you would expect you can make calculations on some very interesting/practical phenomena.
Solve problems related to capacitance, parallel plate capacitors, stored energy, cylindrical capacitors, permittivity, area, separation distance, conductors, length, diameter, electrical charge, potential difference, gauge, volt, energy storage, coulomb and farad.
Online program for calculating various equations related to constant acceleration motion.
Solves problems related to projectile motion, vertical displacement and velocity, horizontal displacement and velocity, range, projection angle, time and acceleration of gravity.
Note, solutions for time include the addition and subtraction of the quadric square root.
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