Question

A stone tied to end of string 2m long is whirled in Horizontal circle makes 10 revolution per second. Find the acceleration

Answer 1

Length of the string, l = 2 m

Number of revolutions = 10

Time taken = 1s

Frequency, v = Number of revolutions / Time taken  =  10/ 1 Hz

Angular frequency, ω = 2πν

= 2 × (22/7) × (10)  =  62.86 rad s

Centripetal acceleration, a = ω² r

= (62.86)²  × 2

= 7902 ms²