Question

Nathan is walking to the store and sees a snake slithering across the sidewalk. He jumps over it with an initial vertical velocity of 10 ft/s. How long does it take for Nathan to land back on the ground?

Answer 1

i need help really bad!

Answer 2

h = v0 t + 1/2 at^2
since acceleration from gravity is -10 m/s^2, when h=0, you have
10t - 5t^2 = 0
Now finish it off