Question

Object is thrown by 50 meter per second at an angle 30 degrees above horizontally find the time required to hit the ground

Answer 1

$v_y=v_0\sin30°-gt\to 0=v_0\sin30°-gt$

$t=\frac{v_0\sin30°}{g}$

$t_{total}=2t=2\cdot\frac{v_0\sin30°}{g}=2\cdot\frac{50\sin30°}{9.8}=5.1\ (s)$ . Answer