APFIVE Vertical Projectile Motion
A ball is launched vertically upward with an initial velocity of 20 m/s. Assuming the acceleration due to gravity is 10 m/s² downward, at what time is the ball’s velocity -10 m/s?
A
1.0 s
B
4.0 s
C
3.0 s
D
2.0 s
Question Leaderboard
| Rank | |||||
|---|---|---|---|---|---|
| #1 | yomoye.dele | 3 | 3 | 0m 00s | 300 |
| #2 | dinhhoa | 1 | 1 | 0m 00s | 100 |
| #3 | aibekn386 | 1 | 1 | 0m 19s | 81 |
| #4 | bubblegeometrydash | 1 | 1 | 0m 27s | 73 |
| #5 | fsfa.alsharif | 1 | 1 | 1m 13s | 27 |
| #6 | dxie26808 | 0 | 2 | 0m 00s | -20 |
| #7 | shengjia905 | 1 | 1 | 2m 22s | -42 |
| #8 | an19stasia12 | 1 | 2 | 4m 13s | -163 |
| #9 | srinikasriyamathur | 2 | 3 | 11h 51m | -42,476 |
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