Boojho is not sure why we say that the distance of the stone from your hand is same when we whirl it around? Can you help him understand this? Remember that stone is held with string.
Fill in the blanks:
(a) One metre is ...... cm.
(b) Five kilometre is ...... m.
(c) Motion of a child on a swing is ..........
(d) Motion of the needle of a sewing machine is .......
(e) Motion of a wheel of a bicycle is .......
While measuring the length of a knitting needle, the reading of the scale at one end is 3 cm and at the other end is 33.1 cm. What is the length of the needle?
Why could you not use an elastic measuring tape to measure distance? What would be some of the problems you would meet in telling someone about a distance you measured with an elastic tape?
