the best way to measure mass is using grams
The best way to measure a highway is in miles.
mass
mass is best measured by fluid volume displacement
the best way to measure body fat is using a Body Mass Index (BMI). It provides a lot more information than a bathroom scale. This calculation uses a ratio of weight to height to estimate body fat.
A balance is the best tool for measuring mass.
Do to its size, the mass of a peanut would probably best be measured in grams.
Not by any sensible, repeatable way, no.
the way to measure those by with times height time length.
Meters
grams
-- An easy way is to put a known mass on a bathroom scale, weigh it, and divide its weight by its mass. -- A more complicated but more accurate way, for which you don't even need a known mass, is to build a pendulum, measure its length, then measure its period.
The best way to measure a force is by using a force sensor or a dynamometer. These tools can accurately quantify the magnitude of a force applied to an object. Additionally, force can also be calculated by multiplying an object's mass by its acceleration, as described by Newton's second law of motion.