A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 s, what is the direction and magnitude of the acceleration of the stone?
Frequency f=2514Hz Angular velocity ω=2πf=252×14πrad/s=3.52rad/s Acceleration is a=ω2r=3.522×0.8=9.9m/s2 The direction is along the radius at every point towards the centre.
Frequency f=2514Hz Angular velocity ω=2πf=252×14πrad/s=3.52rad/s Acceleration is a=ω2r=3.522×0.8=9.9m/s2 The direction is along the radius at every point towards the centre.
