Question

33. A stone is tied to one end of a string and whirled in a horizontal circle of radius 1 m at 20 revolutions
per minute. Calculate the angular velocity and linear speed of the stone. Also find the centripetal
acceleration.​

Answer 1

Answer:

Given length of the string l= 1 m also angular velocity ω=

44

22

revolution/second.

We know linear velocity v=ω×r

Thus velocity v=

44

22

×1=0.5 m/s

And we know centripetal or radial acceleration a

c

=

r

v

2

Thus a

c

=0.25m/s

2