A particle moves in a circle of radius 4 cm clockwise at
constant speed 2 cm s⁻¹. If xˆ and ˆy are unit acceleration
vectors along X and Y respectively (in cm s⁻²), the
acceleration of the particle at the instant half way between
P and Q is given by
(a) -4(xˆ + yˆ ) (b) 4(xˆ + yˆ )
(c) - (xˆ + yˆ ) / √2 (d) (xˆ - yˆ ) / 4
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c) -(xˆ + yˆ ) / √2
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