# Fill in the blanks:$(i)$. One metre is ______________ cm.$(ii)$. Five kilometre is ______________ m.$(iii)$. Motion of a child on a swing is ______________.$(iv)$. Motion of the needle of a sewing machine is ______________.$(v)$. Motion of wheel of a bicycle is______________.

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$(i)$. One metre is $\underline{100}$ cm.

$\because 1 metre=100\ cm$

$(ii)$. Five kilometre is $\underline{5000}$ m.

$\because 1 kilometre=1000\ metre$

$\therefore 5 kilometre=5\times1000=50000\ m$

$(iii)$. Motion of a child on a swing is $\underline{peiodic}$.

When the child swings, its motion is repeated again and again around a fixed point and hence the motion of the swing is called periodic motion.

$(iv)$. Motion of the needle of a sewing machine is $\underline{periodic}$.

The motion of the needle of a sewing machine is periodic vertically as it moves up and down in a fixed time period. So, the motion of the needle of a sewing machine is periodic motion.

$(v)$. Motion of the wheel of a bicycle is $\underline{circular\ and\ linear}$.

The motion of the wheel of a bicycle is circular as it is rotating around its center and linear too as it moves forward on rotating the wheel.

Updated on 10-Oct-2022 13:26:47