Sandra throws an object into the air with an initial vertical velocity of 38 feet per second, from a platform that is 30 feet above the ground. How long will it take the object to hit the ground?

I know part of the equation to solve it, but I can't figure out the first bit:

h = _t^2 + 38t + 30

Question

Mathematics

Happy

26 July, 16:49

Sandra throws an object into the air with an initial vertical velocity of 38 feet per second, from a platform that is 30 feet above the ground. How long will it take the object to hit the ground?

I know part of the equation to solve it, but I can't figure out the first bit:

h = _t^2 + 38t + 30

+5

Answers (1)

Know the Answer?

Paige Williams · Answer 1

To solve it, use the quadratic formula with (½) (-32.174 ft/s²) = a, 38 ft/s = b, and 30 ft = c. There are two answers; the only positive answer is t = 2.986 s

Sandra throws an object into the air with an initial vertical velocity of 38 feet per second, from a platform that is 30 feet above the ground. How long will it take the object to hit the ground?I know part of the equation to solve it, but I can't figure out the first bit:h = _t^2 + 38t + 30

Sandra throws an object into the air with an initial vertical velocity of 38 feet per second, from a platform that is 30 feet above the ground. How long will it take the object to hit the ground?

I know part of the equation to solve it, but I can't figure out the first bit:

h = _t^2 + 38t + 30