alleryStart learning →A pitcher throws a baseball 18.4 m from the mound to home plate in 0.46 s. What is the ball's average speed?
A0.03 m/s
B8.5 m/s
C40 m/s
D85 m/s
Answer & Solution
Correct answer: C. 40 m/s
1. Average speed is distance divided by time.
2. v = 18.4 m / 0.46 s = 40 m/s.
3. 8.5 m/s comes from inverting the division, which mixes up the numerator and denominator.
_Source: OpenStax Physics (CC BY 4.0), Ch 2 "Motion in One Dimension", section 2.2 Speed and Velocity_
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