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# A circular disc is rotating with a varying speed u =(2t-4) m/s, where t is in second. An object is placed in the disc. The pseudo fore on the object is

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a
is maximum at t = 2 sec.
b
is minimum at t = 2 sec
c
is zero at t = 2 sec
d
None of the above
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detailed solution

Correct option is B

Total acceleration of the disc aT2+aR2 and pseudo force depends on net acceleration.aT=2 m/s2aR=u2/R        at       t =2sec                                                                                                                  u=0                                                                                                                  aR=0

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