The Earth has mass 5.98 × 1024 kg, the Moon has mass 7.35 × 1022 kg, and the distance between them is 384, 000 km. (a) Determine the magnitude of the force that the Earth exerts on the Moon. (b) Determine the magnitude of the force that the Moon exerts on the Earth. (c) Determine the Moon's acceleration, assuming that it orbits the centre of the Earth at a constant speed. m/s? (d) Determine the Moon's speed, assuming that it travels at a constant speed in a circular orbit around the Earth. m/s (e) Determine the circumference of the Moon's orbit, assuming that it travels at a constant speed in a circular orbit around the Earth. m (f) Determine the period of the Moon's orbit, assuming tha it travels at a constant speed in a circular orbit around the Earth. S = days
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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