a football coach starts at the 35 yard-line and walks to the 15-yard line. He turns around and walks to the 40-yard line. He turns around again and walks back to the 0-yard line. He turns around one more and walks back to the 25-yard line thus completing his 10 min of pacing. The coachs average speed is
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Expert's answer
2012-11-01T08:41:00-0400
1. A football coach starts at the 35-yard line and walks to the 15-yard line.
So, the first part of his displacement is
D1 = 35 - 15 = 20 yards.
2. He turns around and walks to the 40-yard line.
Coach starts from the 15-yard line and walks to the 40-yard line, so his displacement is
D2 = 40 - 15 = 25 yards.
3. He turns around again and walks back to the 0-yard line.
Coach starts from the 40-yard line and walks to the 0-yard line, so his displacement is
D3 = 40 - 0 = 40 yards.
4. He turns around one more and walks back to the 25-yard line.
Coach starts from the 0-yard line and walks to the 25-yard line, so his displacement is
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