Which expression gives the magnitude of the centripetal acceleration of an object…

PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

Which expression gives the magnitude of the centripetal acceleration

a_c

of an object moving at constant speed

v

in a circle of radius

r

? (a)

a_c = \dfrac{2v^2}{r}

(b)

a_c = \dfrac{v^2}{2r}

(c)

a_c = \dfrac{v^2}{r}

(d)

a_c = \dfrac{v^2}{2\pi r}