Question

An airplane dropped a flare from a height of 2860 feet above a lake. How many seconds did it take for the flare to reach the water?

Answer 1

Aircraft crashed and sank into the water ~ 50 yards off shore, in 45 feet water, ... On his second flight, Charles reached an altitude of 2,700 metres (8,900 ft) ... carrying 16 personnel made an emergency landing on Lake Qadisiyah in Al ... The 777 will reach 500 airplanes delivered faster than any other twin-aisle airplane in ...

Step-by-step explanation:

Answer 2

Answer: 13.2 seconds.

Explanation: using equation of motion; S= ut +1/2at² where u = initial velocity=0

S= distance travelled

a = acceleration due gravity

t= time.

1 foot = 0.305m so,

S= 2860 feet =872.3m

S= ut+1/2 at²

872.3 = 0×t + 1/2×10 × t²

872.3 =0 + 5t²

T²= 872.3/5

T²= 174.46

Take the square root of T we then have;

t = 13.2 seconds to one decimal place.