Only one force: the Sun's gravity. The centrifugal force is sometimes quoted as an opposing force, but it is actually a ficticious force. If there were really two opposing and equal forces, Earth would move in a straight line, not in an elipse.
The two forces that pull on planet Earth to create its orbital path around the Sun are gravity and inertia. Gravity is the force that attracts the Earth towards the Sun, while inertia is the tendency of Earth to continue moving in a straight line unless acted upon by an external force, in this case, the gravitational pull of the Sun.
The gravitational forces between the Earth and Moon keep things together. The moon is slowly getting farther from Earth, however. Ancient humans would have seen a much larger moon in the night sky...
The force that keeps the moon in orbit around the sun is the gravitational force between the sun and the moon. This force causes the moon to continuously fall towards the sun but its orbital motion prevents it from colliding with the sun.
The forces are balanced because they are falling at a constant speed. According to Newtons first law of motion an object will keep moving unless an unbalanced or net force acts upon it. If we may step in here for the novel purpose of answering the question . . . The balanced forces on an object that is falling with constant speed are typically the force of gravity (the object's 'weight') and the equal and opposite force of air resistance.
Photosynthesis helps keep oxygen levels constant by converting carbon dioxide into oxygen, while cellular respiration helps keep carbon dioxide levels constant by converting oxygen into carbon dioxide. These processes are vital for maintaining the balance of atmospheric gases essential for life on Earth.
There is only one force acting on an orbiting spacecraft ... the force of gravity.It's NOT correct to say that a constant speed in a curved path indicates balanced forces.That's true only when the constant speed is in a straight line. If the direction is changing,there must be net forces on the moving object, even if its speed is constant.
No, the sun is not moving closer to the Earth. The distance between the Earth and the sun remains relatively constant due to gravitational forces that keep the two bodies in their respective orbits.
the earth's gravitational pull is just strong enought to keep it in orbit, but not strong enought, at that distance, to pull it back to earth
No, inertia is trying to keep the moon moving in a straight line, which would be away from Earth. Gravity is pulling the moon towards Earth. The result when these two forces are combined is the moon maintaining a constant orbit of Earth.
None. The Earth remains the same size because it does not lose or add material (except for meteorites, which are negligable. Tectonic forces move the -parts- of the Earth around, moving the water out of the way as needed, but nothing is added to or taken from the Earth's size.
Gravity and inertia are the two forces that keep the moon and other satellites in orbit around Earth. Gravity pulls the moon towards Earth, while the moon's inertia keeps it moving forward in a curved path, resulting in a stable orbit.
No resultant forces act upon it
You're half-way there. The mutual, equal gravitational forces between the Earth and Sun maintain the Earth's stable, closed, elliptical orbit around the Earth/Sun common center of mass.
No. An unbalanced force causes motion, but balanced forces keep a body in motion in a straight line at constant velocity, or at rest at constant 0 velocity.
You're half-way there. The mutual, equal gravitational forces between the Earth and Sun maintain the Earth's stable, closed, elliptical orbit around the Earth/Sun common center of mass.
None. The moon orbits the Earth, Earth orbits the Sun. Inertia and the gravity keep the moon in the Earth's orbit.
The two things that keep the Earth in its orbit around the Sun are the gravitational pull of the Sun, which creates a centripetal force that keeps the Earth moving in a curved path, and the inertia of the Earth, which causes it to continue moving in a straight line unless acted upon by an external force. Together, these two forces balance each other to maintain the Earth's orbit.