A particle, modeled as a material point $M$ slides on the plane

under an angle $=30$ with a horizon. Finishing sliding, the

point performs free fail without the influence of air from the

height $h=10m$ and reaches the horizontal distance $d=5m.$

Determine:

the value of the initial velocity $v_0$ of the point $M$ at the

moment of a separation from the sloped plane

the time $t_1$ of a fail.