(a) What is the difference between 'distance travelled' by a body and its 'displacement' ? Explain with the help of a diagram.
(b) An ant travels a distance of 8 cm from P to Q and then moves a distance of 6 cm at right angles to PQ. Find its resultant displacement.
What is the distance travelled by a body and its displacement when it completes one revolution around a circular track with radius r?