APFIVE Relative Velocity in One Dimension
A train moves east at 30 m/s relative to the ground. A passenger walks west at 2 m/s relative to the train. What is the passenger’s velocity relative to a car traveling east at 20 m/s on a road parallel to the tracks?
A
48 m/s east
B
12 m/s east
C
8 m/s east
D
8 m/s west
Question Leaderboard
| Rank | |||||
|---|---|---|---|---|---|
| #1 | yomoye.dele | 3 | 3 | 0m 00s | 300 |
| #2 | dinhhoa | 1 | 1 | 0m 00s | 100 |
| #3 | bubblegeometrydash | 1 | 1 | 1m 01s | 39 |
| #4 | leftoverjluck | 1 | 2 | 1m 46s | -16 |
| #5 | shengjia905 | 0 | 1 | 1m 12s | -82 |
| #6 | srinikasriyamathur | 1 | 2 | 4m 42s | -192 |
| #7 | an19stasia12 | 1 | 3 | 7m 12s | -352 |
| #8 | fsfa.alsharif | 1 | 2 | 11m 07s | -577 |
| #9 | aibekn386 | 2 | 5 | 15m 49s | -779 |
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