If a stone is attached to a string is whirled in a circular path, which of the following forces is supplied by the tension in the string?
Answer & explanation
Correct answer: option 2
Centripetal force: When a body travels along a circular path, its velocity changes continuously. Naturally, an external force always acts on the body towards the centre of the path.
The external force required to maintain the circular motion of the body is called centripetal force.
Examples of Centripetal force:
1. If a stone is attached to a string is whirled in a circular path, the required centripetal force is supplied by the tension in the string.
2. For the motion of planets around the sun, the required centripetal force is supplied by the gravitational attraction of sun.