There is a bob hill with $50$ m height there is a curve at level $25$ m $.$ The radius of the curve $5$ m $.$ Is it a safe contruction? The human body can be damaged over $6$ g acceleration. $[g=10\frac{m}{s}2$

$4.$

The ball is thrown under $30$ degrees with the velocity of $100k\frac{m}{h}.$ Here can you find the ball after $2$ seconds. Give the coordinates of the displacement vector. $g=10\frac{m}{s}2$