Question

29. A ceiling fan of diameter 120 cm is rotating at the speed of 240 rotations per minute (rpm). The linear speed of a dust particle
stuck at the tip of the blade is ....
@ 4.8 m/s
b 48 m/s
0.48 m/s
d 480 m/s​

Answer 1

Answer:

ans =4.8π m/s

Explanation:

angular velocity(w) =angular displacement/time

=240×2π/60 (as 1rotation=2π rad)

=8π rad/s

as we know,

v=rw (r=o.6m)

v(linear speed) =0.6×8π

=4.8π m/s