Aflare is launched from a life raft with an initial velocity of 192 ft/sec. how many seconds will it take for the flare to return to the sea if h = 1 9 2 t − 1 6 t 2 represents the height of the flare in feet above the sea t sec after it is launched?

We use the formula,

Here, h is the  variable  represents the height of the flare  in feet when it returns to the sea so, h = 0 and u is the initial velocity of the flare, in feet per second and its value of 192 ft/sec.

Substituting these values in above equation, we get

.

Here, t= 0 neglect because it is  the time when the flare is launched.

Thus, flare return to the sea in 12 s.

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle