Which one of the following expressions gives the magnitude of centripetal…

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

Problem

Which one of the following expressions gives the magnitude of centripetal acceleration

a_c

of a body moving with linear speed

v

in a circle of radius

r

? (a)

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

(b)

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

(c)

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

(d)

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