alleryStart learning →Cassie walks to her friend's house, 205 m away, with an average speed of 1.40 m/s. How long does the trip take?
A1.4 s
B146 s
C287 s
D870 s
Answer & Solution
Correct answer: B. 146 s
1. Rearrange average speed: time = distance / speed.
2. time = 205 m / 1.40 m/s = 146.4 s.
3. Rounded to three significant figures this is 146 s.
_Source: OpenStax Physics (CC BY 4.0), Ch 2 "Motion in One Dimension", section 2.2 Speed and Velocity_
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