GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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There is no unbalanced force acting on Earth because space is empty and nothing touches Earth.
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The gravitational force pulling Earth toward the sun is equal and opposite to the force pulling the sun toward Earth, so there is no unbalanced force acting on Earth.
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The sun moves in an elliptical orbit around Earth, and the sun’s gravity pulls Earth along.
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Earth moves in an elliptical orbit around the sun because the gravitational force of the sun attracts Earth.
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Detailed explanation-1: -Law of Inertia: Objects will not change their motion until an unbalanced force acts upon them.
Detailed explanation-2: -An unbalanced force acting on an object results in the object’s motion changing. The object may change its speed (speed up or slow down), or it may change its direction. Friction is a force that resists the motion or the tendency toward motion between two objects in contact with each other.
Detailed explanation-3: -Earth moves in an elliptical orbit around the sun because the gravitational force of the sun attracts Earth.
Detailed explanation-4: -When forces are balanced, they cancel each other out, resulting in no change in motion for the object they are acting on. Unbalanced forces do not cancel each other out, and result in a change in motion for the object they are acting on.