Question

If 1 kg ball tide to 1 m long string rotates in horizontal circle with 4 c/s then what is tension in string ?

Answer 1

We find that iron ball falls more rapidlly than piece of paper. This is ... A particle of mass m is attached to a light and inextensible string. ... As vT = √gR => 2mgR + 1/2 mgR = 1/2 mvB2.

Answer 2

Answer:

631N

Explanation:

Mass of the ball , m = 1kg (Given)

Length of the string , l = 1m   (Given)

Rotational frequency of the ball in horizontal circle , f = 4 cycle /sec   (Given)

Thus, the angular frequency  

= 2π × frequency

= 2π × 4

= 8π rad/s

Now, the tension in string-  

T = 1 × (8π)² × 1

= 64π² N

= 64 × (3.14)² N

= 631 N

Hence, if the ball rotates, the tension generated in the string will be 631N