A disc rotates about its axis with a constant angular accelertion of `2 rad//s^(2)`. Find the radial and tangential accelerations of a particle at a distance of `10 cm` from the axis at the end of the fourth second after the disc starts rotating.

Explanation

`omega_(0)=0`, `a=2 rad//s^(2)`, `t=4 s`
` omega=omega_(0)+alpha t=0+2xx4=8 rad//s`
`a_(c)=omega^(2)r=(8)^(2)xx(10)/(100)=6.4 m//s^(2)`
`a_(t)=r alpha=0.1xx2=0.2 m//s^(2)`