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3-2.Motion in Plane
easy
A wheel is of diameter $1\ m.$ If it makes $30$ revolution per second, then the linear speed of a point on its circumference will be
A$30\,\,\pi \,\,\,m/s$
B$\pi \,\,\,m/s$
C$60\,\,\pi \,\,\,m/s$
D$\frac{\pi }{2}\,\,\,m/s$
Solution
$V=r \omega$
$\mathrm{V}=\frac{1}{2} \times(30 \times 2 \pi)$
$\mathrm{V}=30 \pi \mathrm{m} / \mathrm{s}$
$\mathrm{V}=\frac{1}{2} \times(30 \times 2 \pi)$
$\mathrm{V}=30 \pi \mathrm{m} / \mathrm{s}$
Standard 11
Physics
