document.write( "Question 1119771: A 200.0 kg astronaut and equipment move with a velocity of 2.00 m/s toward an orbiting spacecraft. How long must the astronaut fire a 100.0 N rocket backpack to stop the motion relative to the spacecraft? \n" ); document.write( "

Algebra.Com's Answer #735373 by ikleyn(52787) $\"\"$ $\"About$

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document.write( "The mass is m = 200.0 kg\r\n" );
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document.write( "The velocity is v = 2.00 m/s.\r\n" );
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document.write( "The force to decelerate is F = 100 N.\r\n" );
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document.write( "The time \"t\" to stop is  Ft = mv,     ( <<<---=== the momentum/impulse conservation law)\r\n" );
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document.write( "which gives  t =  =  = 2*2 = 4 seconds.\r\n" );
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