SOLUTION: Suppose a rock is dropped from a height of 100m on Mars and also on Venus. On Mars .g=3.7 m/s2 and Venus,g = 8.9m/s2.How long does it take the rock to fall to a Height of 25 m on

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Question 169848: Suppose a rock is dropped from a height of 100m on Mars and also on Venus.
On Mars .g=3.7 m/s2 and Venus,g = 8.9m/s2.How long does it take the rock to fall to a Height of 25 m on each Planet

Answer by Alan3354(69443) About Me  (Show Source):
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Suppose a rock is dropped from a height of 100m on Mars and also on Venus.
On Mars .g=3.7 m/s2 and Venus,g = 8.9m/s2.How long does it take the rock to fall to a Height of 25 m on each Planet
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In both cases, it's the time to fall 75 meters.
s+=+%28at%5E2%29%2F2 (s is the distance)
On Mars:
(((75 = (3.7t^2)/2}}}
3.7%2At%5E2+=+150
t+=+sqrt%28150%2F3.7%29
t = 6.367 seconds
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On Venus:
The only change is gravitational acceleration, so start with:
t+=+sqrt%28150%2Fg%29
t+=+sqrt%28150%2F8.9%29
t = 4.105 seconds