Acceleration in an Inertial Reference Frame
A student stands on a moving walkway that travels at 1.5 m/s east. The student walks at 0.8 m/s west relative to the walkway. A ball is thrown horizontally at 10 m/s east relative to the ground. If the ball experiences a constant acceleration of 9.8 m/s² downward, what is the ball’s acceleration as observed by the student?
A
9.1 m/s² in a direction below horizontal
B
9.8 m/s² downward and 0.7 m/s² east
C
9.8 m/s² downward
D
9.8 m/s² downward and 0.7 m/s² west
Question Leaderboard
| Rank | |||||
|---|---|---|---|---|---|
| #1 | kimmj091109 | 6 | 6 | 2m 01s | 479 |
| #2 | shiftcross9 | 4 | 4 | 0m 00s | 400 |
| #3 | conniechen0664 | 4 | 4 | 0m 48s | 352 |
| #4 | alainaapatel | 3 | 3 | 0m 24s | 276 |
| #5 | slak.spranav1087 | 4 | 4 | 2m 45s | 235 |
| #6 | songqiuhui2012 | 3 | 4 | 1m 23s | 207 |
| #7 | epickidaaron | 2 | 2 | 0m 00s | 200 |
| #8 | flythree.lin | 2 | 2 | 0m 06s | 194 |
| #9 | nidhisunil09 | 2 | 2 | 0m 09s | 191 |
| #10 | clarisapinetree121 | 2 | 2 | 0m 10s | 190 |
Items per page:
10
1 – 10 of 112