Circular Motion Mcqs MDCAT

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Q1: The angular speed of a particle moving in  a circle of radius 20cm , increases from 2rad/s to 40 rad/s in 9s. The ratio of its centripetal acceleration to tengential acceleration at the end of 19s?

A) 400 : 1

B) 800 : 1

C) 14   : 20

D) 7    : 40

And is B) 800 : 1

Q2: The minute hand of large clock is 3 long. What is its mean angular speed?

A) 1.0 x 10^-3 rad/s

B) 1.4 x 10^-4 rad/s

C) 5.2 x 10^-3 rad/s

D) 1.7 x 10^-3 rad/s

Ans is D) 1.7 x 10^-3 rad/s