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ryann ryann
wrote...
Posts: 261
5 years ago
A ball is launched straight up with initial velocity vo. (Neglect air resistance) If the initial velocity vo is doubled, the time to reach the apex of the trajectory...

A: doubles.
B: increases by a factor of 4.
C: Neither of these.
D: Not enough information given.
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wrote...
Valued Member
5 years ago Edited: 5 years ago, cloveb
A: doubles.

Constant accel says vf = v0 + a*time, and here, vf = 0 because

we're at the top. So, v0 = -a * time, which means if you double v0, you double the time.
ryann Author
wrote...
5 years ago
makes sense. thanks
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