a stone tied to the end of string 80 cm long is whirled in a horizontal circle with a constant speed

Asked by  | 26th Jul, 2009, 12:59: AM

Expert Answer:

Here ,length, l = 80 cm

ω = 14 x 2  / 25  =  88 /25 rad /s

Therefore, acceleration of stone

a = l ω2  =  80 ( 88 /25 )2  = 991.2 cm /s2

                                              = 9.91 m /s2

Since the motion of stone is circular motion, therefore, acceleration of stone at any instant is directed towards the centre along the radius.

Answered by  | 26th Jul, 2009, 12:27: PM

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