Question

A train is traveling over a bridge at 30 miles per hour. A man on the train is walking toward the rear of the train at 5 miles per hour. How fast is the man traveling across the bridge in miles per hour?

Answer 1

This sound a bit like if you and a friend are on a train throwing a ball back and fourth to each other at 10 km/h and the train is traveling at 40km/h , how fast is the ball traveling to you and how fast is the ball traveling to your friend ? Sorry I don't know the answer to that one but i suspect the man in your question might be traveling at 25mph.

Answer 2

25mph is right! How did you figure out the solution?

Answer 3

Ill tell you but how did you know 25mph was right ?

Answer 4

I typed in my homework it was marked right

Answer 5

homework website*

Answer 6

ok, well look at it this way, say just as this train is beginning to go over the bridge at 30mph and the man is at the front of the train. He starts running back at 30 mph, running all the time trough every carriage, he is going to stay atthe sart of the bridge while the rest of the train is crossing it so he will be going zero miles per hour over the bridge.

Answer 7

he is stationary to the bridge

Answer 8

get it ?

Answer 9

Yeah I understand now, thank you!

Answer 10

Einstein talked about things like this in relation to motion and relativity, it can get pretty complex but understandable :)