document.write( "Question 1119773: A ball thrown straight up travels for 3.0s before beginning to fall. Neglecting air resistance, with what velocity was the ball thrown? \n" ); document.write( "

Algebra.Com's Answer #735378 by ikleyn(53763) $\"\"$ $\"About$

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document.write( "The ball started with velocity v directed vertically up, and was decelerated with the deceleration of g = 9.81 m/s^2\r\n" );
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document.write( "(the gravity acceleration at the Earth surface).\r\n" );
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document.write( "For the goals of this problem you can accept g = 10 m/s^2.\r\n" );
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document.write( "Then the equation to stop moving up is\r\n" );
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document.write( "    0 = v - gt,   or  v = g*t = 10*3 = 30 m/s.\r\n" );
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document.write( "Answer.  The initial velocity of the ball was  30 m/s.\r\n" );
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