Question

Four point size metal spheres each of mass 1 kg are placed on a turn table and are connected by four strings of equare. If the spheres are rotated with an angular velocity
`(1)/(pi)` rps, the tention in the connecting strings is
A. 4 N
B. 2 N
C. 1 N
D. 3 N

Answer 1

Correct Answer - B
If T is the tension in each string,
`sqrt2T=mr omega^(2)`
`but , r=(l)/(sqrt2)=(1)/(sqrt2) m `
` T = (mromega^(2))/(sqrt2) ((1)((1)/(sqrt2)) (2pi (1)/(pi))^(2))/(sqrt2)`
`=(4)/(2)=2N`.