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jogging jake runs at 4 m/s along a train flatcar that moves at 10 m/s in...

jogging jake runs at 4 m/s along a train flatcar that moves at 10 m/s in the opposite direction. Jakes speed relative to the ground is
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Answer #1

Let the speed of joke is 4 m/s along the x-axis

train speed is 10m/s along negative x-axis

then the relative speed of joke is 10-4 = 6 m/s along the negative x-axis as the ground is stationary.

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