SOLUTION: A projectile is fired from the ground with an upward speed of 245m/s. After how many seconds will it return to the ground? use the formula {{{h=vt-4.9t^2}}}
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Question 206638: A projectile is fired from the ground with an upward speed of 245m/s. After how many seconds will it return to the ground? use the formula
Answer by Targetweek(62) (Show Source): You can put this solution on YOUR website!
well first use the equation...
- (where Vf = final velocity, Vi = initial velocity)
and solve for t
Since the velocity is zero at the peak that's our final velocity
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-
-
-
-
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- so the projectile took 24.97 seconds to reach the peak
To find how long before it hit the ground simply double the time it took to reach the peak so...
So the projectile took 49.94 seconds to return to the ground
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