An insect jumps from ball A onto ball B, which are suspended from inextensible light strings each of length `L=8cm`. The mass of each ball and insect is same. What should be the minimum relative velocity (in `ms^-1`) of jump of insect w.r.t. ball A, if both the balls manage to complete the full circle?

Answer

`(8)`

Explanation

For completing the full circle:

`u/2=sqrt(5gL)impliesu=4ms^-1`
Relative velocity `=2u=8ms^-1`