SOLUTION: A passenger on a train traveling at 135 km/h walks toward the back of the train at a rate of 7 km/h. What is the passenger's rate of travel with respect to the ground?

Question 99811This question is from textbook Algebra: Structure and Method
: A passenger on a train traveling at 135 km/h walks toward the back of the train at a rate of 7 km/h. What is the passenger's rate of travel with respect to the ground? This question is from textbook Algebra: Structure and Method

Answer by Adam(64) (Show Source): You can put this solution on YOUR website!
Passenger is moving in opposite direction then train.If we denote w-velocity of train with respect to ground and u- velocity of passenger with respect to train and v-velocity of passenger we can using classical mechanichs claim that v = w-u
v = 135-7 = 128
but if you would like to be more precise you could also use relavistic formula : , where c is speed of light (around 300000 km/s) which yields 128.0000000000014

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