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For example, an object on a level surface is pulled (attracted) downward toward the center of the Earth by the force of gravity. At the same time, a force is applied by the surface that resists the downward force with equal upward force (called a normal force). The situation produces zero net force and hence no acceleration. [3]
In 1933, Wiley Post repeated his 1931 circumnavigation by aeroplane, but this time solo, using an autopilot and radio direction finder. He made the first solo aerial circumnavigation in a time one day faster than his previous record: 7 days, 19 hours, 49 minutes, in which he covered 25,110 kilometres (15,600 mi), but did not cross the equator.
44 hours and 6 minutes 8 January 1980 10 January 1980 Retains record for circumnavigation using only scheduled transportation. [26] Air France: 32 hours 49 minutes and 3 seconds 12 October 1992 13 October 1992 Concorde FAI "Westbound Around the World" world air speed record from Lisbon, Portugal. [27] [28] [29] Michel Dupont and Claude Hetru
A newton is defined as 1 kg⋅m/s 2 (it is a named derived unit defined in terms of the SI base units). [1]: 137 One newton is, therefore, the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in the direction of the applied force.
Valery Bykovsky flew solo for 4 days, 23 hours in Vostok 5 from 14 to 19 June 1963. [37] The flight set a space endurance record which was broken in 1965 by the (non-solo) Gemini 5 flight. The Apollo program included long solo spaceflight, and during the Apollo 16 mission, Ken Mattingly orbited solo around the Moon for more than 3 days and 9 hours.
The solo flight circumnavigation lasted 13 days, 8 hours, 33 minutes (14 days 19 hours 50 minutes to landing) and covered 20,626.48 statute miles (33,195.10 km). During this flight, the balloon reached speeds of up to 322 kilometers (200 miles) per hour, and flew as high as 10,580 meters (34,710 feet).
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A body remains at rest, or in motion at a constant speed in a straight line, unless it is acted upon by a force. At any instant of time, the net force on a body is equal to the body's acceleration multiplied by its mass or, equivalently, the rate at which the body's momentum is changing with time.