GK
SOLAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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gravity & inertia
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heat & pressure
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inertia & pressure
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gravity & heat
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Detailed explanation-1: -The Sun’s gravity pulls the planets in orbit around it, and some planets pull moons in orbit around them. Even spacecraft are in motion through the solar system, either in orbit around the Earth or Moon, or traveling to further worlds, because of gravitational forces.
Detailed explanation-2: -A planet moves around the sun in a circular path for which the gravitational force of attraction on the planet by the sun provides the necessary centripetal force. This centripetal force is always directed towards the centre of the sun at each point of its path which is responsible for circular motion of planet.
Detailed explanation-3: -Instead, planets orbit the Sun. They essentially are in constant freefall towards the Sun, but their velocity is tangential to their orbit, and that keeps them from ever falling in.