Question

a stone tied to the end of a string 90cm is whirled in a horizontal circle with constant speed. if the stone makes 15 revolutions in 30 seconds , what is the magnitude and dirction of the acceleration of stone​




plzz answer this question

Answer 1

Answer:

Frequency f=

25

14

Hz

Angular velocity ω=2πf=

25

2×14π

rad/s=3.52rad/s

Acceleration is a=ω

2

r=3.52

2

×0.8=9.9m/s

2

The direction is along the radius at every point towards the centre.