Force equals mass multiplied by acceleration (F = ma). SI unit of force is Newton (N), defined as kg m/s². Force is a vector quantity with magnitude and direction
Force is the push or pull exerted on an object to make it move. Newton's second law relates force to mass and acceleration. Greater mass requires greater force to move an object
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Newton's Principia was published in 1687 as a three-volume work. The book was authorized by Samuel Pepys, the Royal Society's President. Newton's initial work on planetary motion was sent to Halley in 1684
Newton (N) is the SI unit of force. One newton equals 1 kg⋅m/s² acceleration of 1 kg at 1 m/s². Named after Isaac Newton for his second law of motion. Standardized in 1946 by CGPM Resolution 2
Gravity is a force that attracts all masses towards Earth's center. Sir Isaac Newton discovered gravity in 1687 while observing falling apples. Einstein viewed gravity as warping space and time