Question

A particle moves in a circle circle of radius 25 cm at two revolutions per second the acceleration of the particle is

Answer 1

Firstly, units of acceleration are m/s^2. Secondly it's important to note that the acceleration is always changing in direction (always directed to the center of the circle). To determine the magnitude of this acceleration

a=rω2=r(2πf)2=(0.25)(2π(2))2=39.5ms−2a=rω2=r(2πf)2=(0.25)(2π(2))2=39.5ms−2