Question 442619
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Hi,

I have an algebra question that states the following: (not sure where to go with this)

If h = -16t^2 + 48t represents the height of a rocket, in feet, t seconds after it was fired, when will the rocket hit the ground?

It does give a hint: "The rocket is on the ground when h = 0"

So it states that the rocket will hit the ground after _______ second(s). 
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It is interesting to know how  physicists solve such problems.


The problem says that the model rocket was launched from the ground level 
with vertical speed of v = 48 feet per second, and the gravity acceleration 
is g = 32 ft/s^2.


Then according to kinematic, the time to get the highest point is  t = {{{48/32}}} = 1.5 seconds,
and the same time of 1.5 seconds is needed for the model rocket to fall from the highest point to the ground.


The sum 1.5 + 1.5 = 3 seconds is the time from the starting moment to the moment when
the model rocket hits the ground.
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Solved.