SOLAR SYSTEM

Detailed explanation-1: -As an object moves in a circle, it is constantly changing its direction. At all instances, the object is moving tangent to the circle. Since the direction of the velocity vector is the same as the direction of the object’s motion, the velocity vector is directed tangent to the circle as well.

Detailed explanation-2: -Of course, if an object is traveling in a circular path and the centripetal force is removed, the object will continue traveling in a straight line in whatever direction it was moving at the instant the force was removed.

Detailed explanation-3: -In a circular motion, the direction of velocity at any point is along the to the circle.

Detailed explanation-4: -According to Newton’s second law, a non-zero net force is needed to cause acceleration. In the case of an object moving in a circular path the acceleration is directed toward the center of the circle. Therefore the net force is also directed toward the center. This net force is often called the centripetal force.

Detailed explanation-5: -For objects moving in circles at constant speed, the net force is directed towards the center of the circle about which the object moves. Such a direction is described as being centripetal.