Answer :
A body's direction constantly shifts as it circles around. This shift in direction causes a change in velocity, which causes the motion to accelerate. We know from Newton's First Law that an external force is necessary to produce acceleration. Therefore, a force is required to maintain the body's circular motion.
What force must be applied to maintain an object's motion in a circle?
A net force called a centripetal force acts on an object to keep it moving in a circular motion.
According to Newton's first law, unless a force acts on an object, it will either stay in place or continue to move at a constant speed. Inertia is the term for this notion. An object has more inertia the heavier it is (or the more mass it has). Due to their greater inertia, heavy objects are more difficult to move than light ones.
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