Question

A skiy diver, with parachute unopened, falls 625 m in 15.0s.

Answer 1

Answer:

average velocity = 6.25m/sec

Explanation:

given data:

for unopened

height = 625 m

time  = 15 sec

for opened

height = 356 m

time =  142 sec

Unopened:

$V1 = \frac{625\ m}{15\ sec} = 41.67m/sec$

Opened:

$V2 = \frac{356\ m}{142\ sec} = 2.51m/sec$

we know that

Total Average Velocity$= \frac{Total\ distance}{Total\ time}$

average velocity$= \frac{981\ m}{157\ sec}$

average velocity = 6.25m/sec

downward direction.