Help with my science HW.

[xSiZzle]

I need halp.

Q:If a ball is thrown straight up with the initial speed of 50 m/s, how high does it travel.

I know that G = -9.81 which my teacher wants us to round to -10 (g = gravity)

I have the diagram of the ball traveling decreasing by 10 each second, but how would I go about finding its height, do I add from 50, or 40. I'm confused.

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[mp7964]

Asking stuff about 9th grade (?) science in a forum of 3/4 8 year olds. Good luck.

[ChexGuy331]

I had Physics last year, in 10th grade. So naturally, I don't remember jack stuff. Soz.

Asking stuff about 9th grade (?) science in a forum of 3/4 8 year olds. Good luck.

Mentally, not educationally.

[xSiZzle]

Asking stuff about 9th grade (?) science in a forum of 3/4 8 year olds. Good luck.

Obviously you know its 9th grade work, wanna help?

[Doomonkey]

f(h)=-5t²+50t+0

-b/2a means that at 5 second it is as high as possible. Plug in 5 for t.

125 meters.

EDIT: I accidentally forgot to use 1/2 gravity the first time I made the formula.

[xSiZzle]

f(h)=-10t²+50t+0

Graph it.

What does f, h, and t =?

[Doomonkey]

What does f, h, and t =?

Nevermind that. I edited it.

[xSiZzle]

f(h)=-10t²+50t+0

-b/2a means that at 2.5 second it is as high as possible. Plug in 2.5 for t.

62.5 meters.

Bro bro, it takes 5 seconds before it reaches its initial height. Gravity decreases it -10m/s.

Every second it goes down by 10.

[|Shadow]

Bro bro, it takes 5 seconds before it reaches its initial height. Gravity decreases it -10m/s.

Every second it goes down by 10.

so it's 6 metres then
[/brainderp]

[Doomonkey]

Bro bro, it takes 5 seconds before it reaches its initial height. Gravity decreases it -10m/s.

Every second it goes down by 10.

Woops, wrong formula, editing old post.

[xSiZzle]

Im thinking 100m, because from second 1 to second 2, it goes 40 M. Reason is at the start Gravity makes it decrease by 10 m/s. from 2 to3, its 30. So 40 + 30 = 70. From 3 to 4, its 20, so now were at 90. In the last second it goes 10 m/s so I think it 100m not sure though.

[xSiZzle]

At 5 seconds it is on the ground.

Woops, broke formula, editing old post.

No because it takes 10 second total. It takes 5 second for it to reach its height, then 5 seconds of freefall? Right?

[Doomonkey]

Im thinking 100m, because from second 1 to second 2, it goes 40 M. Reason is at the start Gravity makes it decrease by 10 m/s. from 2 to3, its 30. So 40 + 30 = 70. From 3 to 4, its 20, so now were at 90. In the last second it goes 10 m/s so I think it 100m not sure though.

No because it takes 10 second total. It takes 5 second for it to reach its height, then 5 seconds of freefall? Right?

See my old post.

[COOKIEZ]

[Mega-Bear]

itt: NERDS