A wheel completes 2000 rotations in covering a distance of 9.5,km . diameter of wheel is &nbs

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3-2.Motion in Plane

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A wheel completes 2000 rotations in covering a distance of $9.5\,km$. The diameter of the wheel is

A

$1.5\,m$

B

$1.5\,cm$

C

$7.5\,m$

D

$7.5\,cm$

Solution

Distance covered by wheel in 1 rotation = $2\pi r = \pi D$ (Where D= 2r = diameter of wheel)

$\therefore $ Distance covered in 2000 rotation = 2000 $\pi D$= $9.5 \times {10^3}m$ (given)

$\therefore D = 1.5\,meter$

Standard 11

Physics

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