100 joules
100 JEnergy · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Energy
Just how much energy is 100 joules?
A little work
100 J
2.7778 × 10⁻⁵ kWhkilowatt-hours
0.023901 kcalkilocalories
01
100 joules100 JEnergy · definition
02
Tennis ball serve kinetic energy120 JDefined launch kinetic energy · derived calculation · range 60 J–180 J
Bar length represents energy. Equal energy does not imply the same temperature, power or usefulness.
A little perspective
The defined launch kinetic energy of Tennis ball serve kinetic energy is about 1.2 times the energy of 100 joules.
Measurements, assumptions & sources +
100 joules
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Tennis ball serve kinetic energy
A defined 120 J serve model, corresponding to a 57.7 g regulation tennis ball moving at about 64.5 m/s, using E = ½mv². Ball mass and launch speed determine the result.
The marked defined launch kinetic energy is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
The visual compares energy with defined launch kinetic energy. The records below preserve each value’s basis and caveats.
Tennis ball serve kinetic energy
120 JDefined launch kinetic energy · derived calculation · range 60 J–180 J
A defined 120 J serve model, corresponding to a 57.7 g regulation tennis ball moving at about 64.5 m/s, using E = ½mv². Ball mass and launch speed determine the result.
- Comparing
- Energy ↔ Defined launch kinetic energy
- Relative size
- Tennis ball serve kinetic energy is larger on this measurement by a factor of about 1.2. Tennis ball serve kinetic energy's selected measurement is approximately 20% greater than 100 joules's.
How to read the visual
The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.
- Tennis ball serve kinetic energy uses a 120 J central value within a recorded range of 60 J–180 J.
- Tennis ball serve kinetic energy is labelled derived calculation; treat the displayed value as a comparison anchor rather than false precision.
- The recorded ranges overlap, so the ordering can vary even though the central values differ.
Change your perspective
Put it next to…
Choose a suggestion to redraw the comparison, or open its page to learn what it is.
A little smaller. A little larger.