Dr. Drew runs 175 meters East for 70 seconds, then walks back 10 meters West in...

Question

Question

Dr. Drew runs 175 meters East for 70 seconds, then walks back 10 meters West in 20 seconds. What is his speed in meters/second for the entire trip?

Answer 1

Answer #1

Total distance travelled, $S=175+10=185\: m$

Total time, $t=70+20=90\: s$

So, speed of Dr. Drew for the entire trip,

$v=\frac{S}{t}=\frac{185}{90}=\mathbf{2.056\: m/s}$

Answer 2

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