Question

B.
A particle is revolving in a circle of radius R with
initial speed u. It starts retarding with constant re-
va
tardation . The number of revolutions it makes
81R
in time
is :​

Answer 1

F=MV2/r

F is inversely proportional to r

then v=r*omega

omega=2pie/t

v=2pie*r/t

then

f = 4\ {\pi}^{2}  {r}^{2}  \div  {t}^{2}  \times r

then f is inversely proportional to time

Answer 2

Answer:

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