document.write( "Question 442619: Hi,\r
\n" ); document.write( "\n" ); document.write( "I have an algebra question that states the following: (not sure where to go with this)\r
\n" ); document.write( "\n" ); document.write( "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?\r
\n" ); document.write( "\n" ); document.write( "It does give a hint: \"The rocket is on the ground when h = 0\"\r
\n" ); document.write( "\n" ); document.write( "So it states that the rocket will hit the ground after _______ second(s).
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Algebra.Com's Answer #853298 by ikleyn(53426) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "Hi,\r
\n" ); document.write( "\n" ); document.write( "I have an algebra question that states the following: (not sure where to go with this)\r
\n" ); document.write( "\n" ); document.write( "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?\r
\n" ); document.write( "\n" ); document.write( "It does give a hint: \"The rocket is on the ground when h = 0\"\r
\n" ); document.write( "\n" ); document.write( "So it states that the rocket will hit the ground after _______ second(s).
\n" ); document.write( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "

\r\n" );
document.write( "It is interesting to know how  physicists solve such problems.\r\n" );
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document.write( "The problem says that the model rocket was launched from the ground level \r\n" );
document.write( "with vertical speed of v = 48 feet per second, and the gravity acceleration \r\n" );
document.write( "is g = 32 ft/s^2.\r\n" );
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document.write( "Then according to kinematic, the time to get the highest point is  t =  = 1.5 seconds,\r\n" );
document.write( "and the same time of 1.5 seconds is needed for the model rocket to fall from the highest point to the ground.\r\n" );
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document.write( "The sum 1.5 + 1.5 = 3 seconds is the time from the starting moment to the moment when\r\n" );
document.write( "the model rocket hits the ground.\r\n" );
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\r
\n" ); document.write( "\n" ); document.write( "Solved.\r
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