Question

Starting in las cruces you drive north to T or C (79 miles) in 68 minutes, then turn around and drive south to El Paso (122 miles) in 98 minutes. Assume north is the positiv direction and that you are driving in a straight line. What is your average velocity? What is your average speed?

Answer 1

Answer on Question #80021, Physics / Mechanics | Relativity

Question:

Starting in las cruces you drive north to T or C (79 miles) in 68 minutes, then turn around and drive south to El Paso (122 miles) in 98 minutes. Assume north is the positiv direction and that you are driving in a straight line. What is your average velocity? What is your average speed?

Solution:

According to average velocity definition $< v > = \frac{79 - 122}{68 + 98} = -0.26$ (miles/minute) $= -15.5$ (miles/hour).

According to average speed definition $< s > = \frac{79 + 122}{68 + 98} = 1.2$ (miles/minute) $= 72.7$ (miles/hour).

The answer:

Average velocity $< v > = -15.5$ (miles/hour).

Average speed $< s > = 72.7$ (miles/hour).

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