A Racecar, Traveling at Constant Speed, Makes One Lap Around $\pi$

question 69

Multiple Choice

A racecar, traveling at constant speed, makes one lap around a circular track of radius r in a time t. Note: The circumference of a circle is given by C=2πr.
-When the car has traveled halfway around the track, what is the magnitude of its displacement from the starting point?

• A)r
• B)2r
• C)\(\pi\)r
• D)2\(\pi\)r
• E)zero meters

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