Question

a particle moves along a semicircle of radius 10m in 5sec. the average velocity of the particle is??
a) 2πm/s
b) 4πm/s
c) 2m/s
d) 4m/s
(i need the solution please)

Answer 1

by appling the formula 2
$(2\pi10 + 2 \times 10) \div 5$
using 2 pi r + 2r its total distance will be (pi 10+20)/5 = 4pi m/sec