Question

5. Darel Griffith is a storied, past NBA player for the Utah Jazz and the star of the 1980 Men's NCAA basketball champions: the University of Louisville Cardinals. He and another NBA player named Michael Jordan hold the record for the highest vertical jump in the NBA: 48 inches (or 1.2 meters) a. Calculate Darrell Griffith's speed just as his shoes leave the floor b. If it takes Darrell Griffith (nicknamed Dr. Dunkenstein) 0.3 seconds to jump off the floor, calculate his average acceleration while his feet are pushing against the floor

Answer 1

a)

From

$V_{y}^{2}=V_{oy}^{2}+2a_{y}(y-y_{o})$

at maximum height V_y=0

$0=V_{oy}^{2}+2(-9.8)(1.2)$

$V_{oy}=\sqrt{23.52}=4.85 m/s$

b)

From

$a_{av,y}=\frac{V_{y}-V_{oy}}{t}=\frac{4.85-0}{0.3}=16.2 m/s^{2}$