- #1
runner1738
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at the moment the train's speed is 54 km/h. what is the magnitude of the total acceleration? units m/s^2 r=173 and it takes 18.9 s to slow down from 82 km/h to 37 km/h, the a tangential is .6614 so is it (15)^2/173 + .6614 = total?