Make all capitalization consistent with the rules of convention outlined in the American Heritage Dictionary. DO capitalize: The first word and any proper nouns in a title, heading, or subheading. Proper nouns, months, days of the week, but not the seasons.
Newton (unit) The newton (symbol: N) is the SI unit of force. It is named after Sir Isaac Newton because of his work on classical mechanics. A newton is how much force is required to make a mass of one kilogram go faster at a rate of one metre per second squared.
BusinessDictionary.com. Metric unit of force, used also as a unit of weight (force due to gravity). One newton is defined as the force that will accelerate a mass of one kilogram at the rate of one meter per second per second, it equals about 0.22 pounds or 0.10 kilograms of force, 7.23 poundals, or 105 dynes. Named after the UK scientist Sir Issac Newton (1642-1727).