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Why did Newton conclude that a force was acting on the moon?

Why did Newton conclude that a force was acting on the moon?

Newton thought that a force must act on the moon because, since it moves in a curved circular path, it is accelerating. After all, the direction of its velocity is constantly changing, and acceleration is the rate velocity changes, and an acceleration requires a net force.

What did Newton determine is necessary for the force exerted by the Sun on the planets to yield elliptical orbits?

What did Newton determine necessary for the force exerted by the Sun on the planets to yield elliptical orbits? The force must be attractive and the force must vary inversely with distance squared. The amount of force on the Sun by Earth is the same as the amount of force on Earth by the Sun.

Which of Newton’s laws states that if an unbalanced force acts on an object then the object’s motion changes?

Newton’s first law of motion states that an object will not experience a change in motion unless acted upon by an UNBALANCED FORCE.

Which Newton law is gravity?

The Universal Law of Gravitation
The Universal Law of Gravitation (Newton’s law of gravity): 1. Every mass attracts every other mass. 2. Attraction is directly proportional to the product of their masses.

How did Newton know that there was a force acting on the moon?

Answer: Newton showed that if gravity at a distance R was proportional to 1/R2 (varied like the “inverse square of the distance”), then indeed the acceleration g measured at the Earth’s surface would correctly predict the orbital period T of the Moon.

Which is greater the force exerted by the Earth on the sun or the force exerted by the Sun on the Earth Why?

Compare the gravitational force the sun exerts on earth to the gravitational force earth exerts on the sun. Both because they both exert a force on each other the difference is the object with the greater mass being earth will exert a greater force.

Do the sun and Earth exert the same force on each other?

Earth’s orbit around the Sun can be understood in similar terms. All objects attract one another, including Earth and the Sun. As the Sun is very large, it exerts a great gravitational force on Earth. The Sun’s gravitational force is like the tetherball rope, in that it constantly pulls Earth toward it.

How did Newton identify the gravitational force?

The legend is that Newton discovered Gravity when he saw a falling apple while thinking about the forces of nature. Whatever really happened, Newton realized that some force must be acting on falling objects like apples because otherwise they would not start moving from rest.