A football coach starts at the 10 yard line (A) and walks to the 40- yard line (B) in 3 minutes. He turns around and walks to the 0- yard line (C) in the next 2 minutes. He turns around again and walks back to the 50- yard line (D) in the next 3 minutes. He turns around once more and walks back to the 25 yard line (E) in the next two minutes, thus completing his 10 minute of pacing. The coach's overall displacement is
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Expert's answer
2016-09-13T10:55:03-0400
Let 0 on x-axis coincides with 0-yard line and x-axis directed towards the 50-yard line. Coach’s overall displacement is the vector that connecting the initial and final position of coach. So, it is the vector with absolute value (25-10)=15 yd and direction that coincides with the x-axis.
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