Comprehension A particle moves with deceleration alongthe circle of radius \( R \) so that at a...

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Comprehension
A particle moves with deceleration alongthe circle of radius \( R \) so that at any moment of time its tangential and normal accelerations are equal in moduli. At the initial moment \( t=0 \) the speed of the particle equals \( v_{0} \).
The speed of the particle as a function of the distance covered \( \mathrm{s} \) will be
(a) \( v=v_{0} e^{-s / R} \)
(b) \( v=v_{0} e^{s / R} \)
(c) \( v=v_{0} e^{-R / s} \)
(d) \( v=v_{0} e^{R / s} \)
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