Initial Velocity of 1.52 m High Jump Record

[uzboi]

Homework Statement

Assuming the best high jump record from a standing position in a school was 1.52 m, what initial velocity was needed for this jump? neglect any sideways motion.

Homework Equations

velocity equation

The Attempt at a Solution

I don't really understand how to do the question? Is there a knowledge part involved that I can't figure out? There is only one given data?

 

[dacruick]

That is not true. Think about the situation more thoroughly. You know that his acceleration is 9.8m/s downwards. You also know that his 1.52 metres is achieved at the peak of his jump, at which time his velocity will be 0. So now you 3 pieces of information.

 

[uzboi]

That is not true. Think about the situation more thoroughly. You know that his acceleration is 9.8m/s downwards. You also know that his 1.52 metres is achieved at the peak of his jump, at which time his velocity will be 0. So now you 3 pieces of information.

Thanks I got the answer :D & How to do it :D