Jake and Brenda drove at a speed of 30 mph for 1 hour. Then they turned around and drove 45 mph until they were back where they started. What is true about their average speed and average velocity?
A. Their average speed and their average velocity are the same.
B. Their average speed is smaller than their average velocity.
C. Their average speed is zero, but their average velocity is not.
D. Their average speed is greater than their average velocity.
Help please?|||Their average speed is 45+30= 75/2= 37.5 mph. Their average velocity is (30 + 67.5 divided by 2)= 48.75. The answer is B|||Average speed: (30 mph 脳 60 minutes + 45 mph 脳 40 minutes) 梅 100 minutes = 36 mph.
Average velocity: (30 mph 脳 60 minutes 鈭?45 mph 脳 40 minutes) 梅 100 minutes = 0 mph.
Velocity has a directional component. Thus, the minus sign.
I judge the answer to be D.
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