A particle `A` is moving in `xy` plane with the constant speed of `2pi m//s` along the path `x^(2)+y^(2)+120y=0`. At time `t=0`. When `A` is at the origin, another particle `B` starts moving from origin with constant acceleration is such a way that at time `t=5s` velocities of both the particles are found to be equal. If sense of motion of `A` is clockwise, calculate the average speed of `B` over first five second.

Explanation

(a)`(pi)/(5(-026hati)m//s^(2)`, (b) (30`hati`-7.8`hatj`)m,13.65`hati`-7.85 `hatj`)m,`pi(1.74hati-hatj`)m/s