A stone whirled on a string moves in a circle. The force keeping it on the circle is:

  1. air resistance
  2. the tension in the string, directed to the centre
  3. a centrifugal force outward
  4. its weight only
Answer

B) the tension in the string, directed to the centre

Tension provides the centripetal force. SLO P-11-B-10 · Understanding

Physics MCQ · More Circular and Rotational Motion MCQs · Practise