SOLUTION: An object is projected upwards with a velocity of 100 m/s . it will strike ground about:

Question 1038213: An object is projected upwards with a velocity of 100 m/s . it will strike ground about:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
An object is projected upwards with a velocity of 100 m/s . it will strike ground about:
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For objects on Earth using metric units, g = 5 m/sec/sec is often used for Earth's gravity.
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v = a*t
100 = 5*t
t = 20 seconds ascending, and 20 seconds descending
--> 40 seconds from launch to impact
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