Nov 17, 2019 · F = ma. where F is force, m is mass, and a is acceleration. Using the SI units for force, mass, and acceleration, the units of the second law become: 1 N = 1 kg⋅m/s 2. A newton is not a large amount of force, so it is common to see the kilonewton unit, kN, where: 1 kN = 1000 N. force. unit. newton, absolute unit of force in the International System of Units (SI units), abbreviated N. It is defined as that force necessary to provide a mass of one kilogram with an acceleration of one metre per second per second. One newton is equal to a force of 100,000 dynes in the centimetre-gram-second (CGS) system, or a force of .

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