Answer the following: Show your complete solutions. 1. Calculate the force of gravitational attraction between a concrete ball (mị 2.0 x 103 kg) and a steel ball (m2 = 2.0 x 104 kg) whose centers are separated by 4.0 m. 2. Calculate the magnitude of force of gravitational attraction between two metal balls used in men's shot put competition, each of mass 7.26 kg and whose centers are separated by a distance of 24 cm. 3. Find the force of attraction between the Earth and the moon using the following data: • Mass of the moon = 7.35 x 1022 kg| • Mass of the earth = 5.98 x 1024 kg • Ave. distance between their centers = 3.84 x108 m
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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