Abu'l-Barakāt Hibat Allah ibn Malkā al-Baghdādī (1080 – 1164 or 1165 CE) was a scholar of the Arabic-Islamic tradition. He wrote Kitab al-Mu'tabar.
His Hebrew birth name was Nathanel, before converting from Judaism to Islam at some point in his life. He served the Saljuq sultan Ḡīāṯ-al-dīn Moḥammad Tapar (d. 511/1118) and wrote a treatise for him. The sultan accused him of treating him improperly and imprisoned him for some time.
Kitab al-Mu'tabar is based on a collection of notes on logic, physics and metaphysics that Abu'l-Barakat composed for himself; some of those notes were copied verbatim from works of other philosophers, notably Avicenna.
Abu'l-Barakāt in many respects followed Avicenna, but also developed his own ideas. He proposed an explanation of the acceleration of falling bodies by the accumulation of successive increments of power with successive increments of velocity, anticipating Newton's second law of motion.
Works of Hibat Allah Abu'l-Barakat al-Baghdaadi
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