Answer:
Both erg and Joule are units of Energy in the CGS and S.I system respectively.
Joule and erg can also be written as (kg m2/s2) and (g cm2/s2) respectively.
Explanation:
1 Joule = 107 erg ⇒ 107 kg m2/s2.
==> One erg of energy is the amount of work done when one dyne of force acts through a distance of one centimeter.
==> One Joule of energy is the amount of work done when one Newton of force (100,000 dynes) acts through a distance of one meter (100 centimeters).
==> That makes one Joule the same amount of energy as 10 million (10⁷) dynes.