30 kilograms
30 kgMass · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Mass
Everyday mass
Bar length measures mass, not physical size. Both bars start at zero kilograms (kg). Pictures identify the objects only.
A little perspective
The trunk mass in a 70 kg model of the human torso is about 1.01 times 30 kilograms.
Mass: 30 kg; definition.
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Trunk mass in a 70 kg model: 30.42 kg; representative model; range 25 kg–36 kg.
A headless trunk in a defined 70 kg adult model: 60 cm from shoulder level to hip and 30.42 kg using a published trunk mass fraction. Arms, legs, neck and head are excluded; this is not a population average.
de Leva — Adjustments to Zatsiorsky-Seluyanov segment inertia parameters
The marked trunk mass in a 70 kg model is calibrated. Unmeasured illustration details are representative.
Measurement details
Compare 30 kilograms with the trunk mass in a 70 kg model of the human torso. The notes below explain how each value was chosen.
Mass · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Trunk mass in a 70 kg model · representative model · range 25 kg–36 kg
A headless trunk in a defined 70 kg adult model: 60 cm from shoulder level to hip and 30.42 kg using a published trunk mass fraction. Arms, legs, neck and head are excluded; this is not a population average.
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
Mass is distinct from weight: an object’s mass stays the same as gravity changes.
Change your perspective
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A little smaller. A little larger.