Question

t] le ball. A stone tied to one end of a string 70 cm long is whirled in [Ans. 30-84 m -2] n a horizontal circle with a constant speed. If the stone makes 10 revolutions in 20 s, what is the direction and magnitude 1 of the acceleration of the stone ? (P.S.S.C.E. 1991) [Ans. along radius of the circular path, 690-87 cm s-2]​

Answer 1

Answer:

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Explanation:

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.