Kinematics Question 728

Question: An electric fan has blades of length 30 cm as measured from the axis of rotation. If the fan rotating at 1200 r.p.m. The acceleration of a point on the tip of the blade is about[CBSE PMT 1990]

Options:

A) 1600 m/sec2

B) 4740 m/sec2

C) 2370 m/sec2

D)5055 m/sec2

Show Answer

Answer:

Correct Answer: B

Solution:

ω2r=4π2n2r =4π2(120060)3×30

=4740m/s2



NCERT Chapter Video Solution

Dual Pane