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The height in meters of a projectile can be modeled by h = 4.9t^2 + vt + s where t is the time (in seconds) the object has been in the air, v is the initial velocity (in meters per seconds) and s is the initial height (in meters). A soccer ball is kicked upward from the ground and flies through the air with an initial vertical velocity of 4.9 meters per second. After how many seconds does it land approximately?
 10 months ago
 10 months ago
The height in meters of a projectile can be modeled by h = 4.9t^2 + vt + s where t is the time (in seconds) the object has been in the air, v is the initial velocity (in meters per seconds) and s is the initial height (in meters). A soccer ball is kicked upward from the ground and flies through the air with an initial vertical velocity of 4.9 meters per second. After how many seconds does it land approximately?
 10 months ago
 10 months ago

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terenzreignzBest ResponseYou've already chosen the best response.1
When it lands, what height does it have?
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
Wrong way to phrase it... Let me rephrase.... How high is the ball when it lands?
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
When it lands, is it 4.9 meters above the ground?
 10 months ago

allie_bear22Best ResponseYou've already chosen the best response.0
what do i have to do to get the answer?
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
Start with that... find the height of the ball as soon as it lands. It just takes a little intuition and visualization :)
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
So... when the ball lands, it is 16 meters underground?
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
16 means when the ball lands, it is 16 meters above the ground (in midair). Does that seem reasonable?
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
Then... what is reasonable? When the ball lands, its height is...?
 10 months ago

allie_bear22Best ResponseYou've already chosen the best response.0
didnt mean to put tht srry
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
Well... you mean to tell me that when the ball *lands* it is 5 meters above the ground, then?
 10 months ago

allie_bear22Best ResponseYou've already chosen the best response.0
omg!! i really dont kno
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
Think... meditate... :P Now... how high is the ball when it LANDS... how many meters above the ground is the ball when it LANDS...
 10 months ago

allie_bear22Best ResponseYou've already chosen the best response.0
yay!!!! that was easy lol
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
Of course, when the ball lands, it is on the ground. Thus, it is 0 meters above the ground.
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
0 is not the answer. .
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
that's just a stepping stone...
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
We need v and s. We already have v, the initial velocity, 4.9
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
What's the initial height (s) ?
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
Are you guessing? I strongly advise against it... it's too risky.
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
And no, the initial height is not \(\ 4.9^2\)
 10 months ago

allie_bear22Best ResponseYou've already chosen the best response.0
ok thnx for your help ill do the rest by myself :) thnx
 10 months ago

terenzreignzBest ResponseYou've already chosen the best response.1
Are you sure? Well, if you're sure, post your answer here.
 10 months ago
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