(adsbygoogle = window.adsbygoogle || []).push({}); Kinematics Problem. How do I get T to solve for V(i). PLEASE HELP

9.Superman is supposed to leap tall buildings in a single bound. Suppose that he obeys the normal laws of physics in this feat. Estimate how fast he should be moving when he leaves the ground so that he just clears the top of Disque Hall. (Hint # 1: how fast would he be moving if he just fell off the top? Hint #2: you have to estimate how tall Disque Hall is.)

Disque Hall is I estimate about 160 feet tall.

with hint #1, I mean, I know g=9.8 m/s^2 but how do I use that to help me figure out how fast he should be going to over leap the building?

Please help me!

*edit, alright, I mean, I know this equation is

d=v(i)t + 1/2at^2

so I have d, which is 160 feet, I have a, which is 9.8 m/s^2, but I converted that into feet to match the building, so a, is now 32.2 ft/s^2. and I know I'm trying to solve for the initial velocity, which has to be great enough so that he can jump over the building, but how do I find t? am I supposed to just guess how long it'll take him?! because then I would know all the variables, but that doesn't seem right

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# Homework Help: Estimate how fast he should be moving

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