2.Motion in Straight Line
easy

A particle moves along a semicircle of radius $10\,m$ in $5$ seconds. The average velocity of the particle is...........$ms^{-1}$

A

$2\pi $

B

$4\pi $

C

$2$

D

$4$

Solution

(d) Velocity of particle $ = \frac{{{\rm{Total \,diplacement }}}}{{{\rm{Total \,time }}}}$

$ = \frac{{{\rm{Diameter\, of\, circle}}}}{5} = \frac{{2 \times 10}}{5} = 4\;m/s$

Standard 11
Physics

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