Question

A helicopter is ascending vertically
with a speed of 8.0 ms". At a height of 120 m above
the earth, a package is dropped from a window. How
much time does it take for the package to reach the
ground?​

Answer 1

Explanation:

R.E.F. Image.

U = 8 cm/sec.,a = -g

s =ut+

2

1

at

2

−12=8t−

2

1

×9t

2

−12=8t−5t

2

5t

2

−8t−12=0

t = 2.53 seconds.