Posted by Kelsey on Monday, September 16, 2013 at 2:33pm.
At the airport they have people movers (horizontal escalators). Your friend decides to use the people mover and since you've been sitting decide to walk along side. You would like to continue your conversation and thus need to continue moving at the same speed. Assuming your friend is walking at the same speed now as he was before stepping onto the people mover, what do you need to do to continue talking ?

Physics  Steve, Monday, September 16, 2013 at 3:17pm
double your speed
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