anonymous
  • anonymous
An aircraft has a mass of 3.10 x 105 kg. At a certain instant during its landing, its speed is 48.2 m/s. If the braking force is 3.40 x 105 N, what is the speed of the airplane 11.9 s later?
Physics
schrodinger
  • schrodinger
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TuringTest
  • TuringTest
Newton:\[F=ma\]Kinematic:\[v=vi+at\]we can get the acceleration of the plane from the first equation, and plug that and the given numbers into the second one to find the velocity after 11.9 seconds (note that acceleration will be in the negative direction here)
anonymous
  • anonymous
do i need to do any conversion of units here?
anonymous
  • anonymous
between mass and force

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TuringTest
  • TuringTest
Kg, m, m/s, and N all SI base units, so nope
anonymous
  • anonymous
but i got 61.2m/s
anonymous
  • anonymous
and the computer anint accepting my answer
anonymous
  • anonymous
i found acceleration,then substituted it into the equation

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