centripetal markaz-gerâ Fr.: centripète Acting or moving toward a → center or → axis. → centripetal acceleration, → centripetal force. From Mod.L., coined 1687 by Sir Isaac Newton from L. centri- combining form of centrum "center" + petere "to fall, rush out;" cf. Av. pat- " to fly, fall, rush," Skt. patati "he flies, falls," Mid.Pers. patet "falls," opastan "to fall," Mod.Pers. oftâdan "to fall;" Gk. piptein "to fall," petomai "I fly;" PIE base *pet- "to fly, to rush." Markaz-gerâ, from markaz, → center, + gerâ "inclining," from gerâyidan "to incline toward;" Mid.Pers. grâyitan, → diverge. |
centripetal acceleration šetâb-e markaz-gerâ (#) Fr.: accélération centripète The rate of change of the → tangential velocity of a body moving along a circular path. The direction of centripetal acceleration is always inward along the → radius vector of the → circular motion. The magnitude of the centripetal acceleration is related to the → tangential velocity (v) and → angular velocity (ω) as follows: a_{c} = v^{2}/r = rω^{2}. According to → Newton's second law, an object undergoing centripetal acceleration is experiencing a → centripetal force. → centripetal; → acceleration. |
centripetal force niru-ye markaz-gerâ (#) Fr.: force centripète The force exerted on an object in → circular motion which is directed toward the center and keeps the body in motion. Centripetal force produces → centripetal acceleration, according to → Newton's second law: F_{c} = ma_{c}. Its direction is always inward along the → radius vector, and its magnitude is given by: F_{c}= ma_{c} = mv_{t}^{2}/r = mω^{2}r. → centripetal; → force. |