SOLUTION: 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 rel

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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?
Answer by ikleyn(52786)   (Show Source): You can put this solution on YOUR website!
.
The mass is m = 200.0 kg


The velocity is v = 2.00 m/s.


The force to decelerate is F = 100 N.


The time "t" to stop is  Ft = mv,     ( <<<---=== the momentum/impulse conservation law)


which gives  t =  =  = 2*2 = 4 seconds.


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