projectile shot upward at 75m/s from a height of 10m off the grand. how long will it take for the projectile to be at ground level? what equation do i need to solve this problem?

Respuesta :

According to the given information since the object is already place 10m higher, to reach the ground level the object has to go 10m downwards thus S= -10m 
try S=ut+1/2at2