A fishing boat with two people on it runs out of gas while out in a bay. The people set off an emergency flare from a height of

Question

3 years ago

8

A fishing boat with two people on it runs out of gas while out in a bay. The people set off an emergency flare from a height of

2 meters above the water. The flare has an initial vertical velocity og 30 meters per second. How long does it take the flare to reach its maximum height? What is that height?

Mathematics

1 answer:

elixir [45] · Answer 1 · 2021-12-22T12:09:38+03:00

Answer:

Step-by-step explanation:

time taken to reach the max height is expressed according to the projectile equation;

tmax = u/g

Given u = 30m/s

g is the acceleration due to gravity = 9.81

t = 30/9.81

t = 3.0secs

hence it will take the flare 3.06secs to reach its maximum height.

Max height = u²/2g

Max height = 30²/2(9.81)

Max height = 900/19.62

Max height = 45.87m

If the people set off an emergency flare from a height of 2 meters above the water, the total height will be 45.87 + 2 = 47.87m