1. The problem statement, all variables and given/known data A jumper takes off with a velocity of 5 ms at an angle of 20 degrees to the horizontal. How high does he raise his center of gravity? 2. Relevant equations 3. The attempt at a solution I know that Vh= 5scos20 = 1.7 m/s and Vv=5Csin20=4.70 m/s using 0=Vi^2 + 2ad 0=5sin20 + 2 X-9.81d 19.62d=1.7 d=1.7/19.62 d=0.087m, but its incorrect. Am I misssing something? The only Thing I can think of is beacuse its his centre of gravity that I should treat it as a vertical launnched projectile?