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Physics
A 10^4 kg train moving at 20m/s stops in a distance of 500m. Calculate the force applied by the train's braking system.
1 answer
a=(V^2-Vo)/2d = (0-20^2)/1000=-0.4 m/s^2
F = m*a = 10000 * -0.4 = -4,000 N.
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