1. The problem statement, all variables and given/known data Standing position: 100cm Lowered hip position: 77cm Peak height: 140cm Question "Use the peak height of the jump and the standing hip position to calculate the initial velocity of the jumper just after he left the ground" 2. Relevant equations Unknown 3. The attempt at a solution Unknown - I only know equations that require time. I know no time measurement in this problem. The problem is a jumping problem. The variable above, in order, are: 1. Standing tall - from the floor to the hip 2. Crouched down to jump - from the floor to the hip 3. In mid-air at the peak of the jump - from the floor to the hip. These were measured using a 2-meter stick.