Referring to the Newton's law of universal gravitation, if a person has a weight of 700N on earth, how much is his weight, when he is in a balloon in a high altitude? O a. Bigger than 700 N, as g is proportional by square of distance form center of earth O b. Smaller than 700 N, as g is inversely proportional by square of distance form the center of earth OC. The same 700 N, as g is always constant. O d. It is zero, as above ground surface, g is zero
Gravitational force
In nature, every object is attracted by every other object. This phenomenon is called gravity. The force associated with gravity is called gravitational force. The gravitational force is the weakest force that exists in nature. The gravitational force is always attractive.
Acceleration Due to Gravity
In fundamental physics, gravity or gravitational force is the universal attractive force acting between all the matters that exist or exhibit. It is the weakest known force. Therefore no internal changes in an object occurs due to this force. On the other hand, it has control over the trajectories of bodies in the solar system and in the universe due to its vast scope and universal action. The free fall of objects on Earth and the motions of celestial bodies, according to Newton, are both determined by the same force. It was Newton who put forward that the moon is held by a strong attractive force exerted by the Earth which makes it revolve in a straight line. He was sure that this force is similar to the downward force which Earth exerts on all the objects on it.
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