What formula is used for: Object dropped off a 210 ft building. Initial v=-24. What is the velocity at 130 ft? s(t) = -16t^2-24t+210. v(t) = -32-24. Already got velocity after 3 sec but not sure how to adjust formula for v at 130 ft.
Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
Tried making s(t)=0 to find t then install value for t into v(t)=-32t-24 but polynomial was not factorable. Quad. equation gave a ridiculous answer.
-16t^2 - 24t+210=130
Solve for t
when you obtain t use the t as substitute for v=32-24
Your velocity formula is wrong btw
it should be v(t)=-32t-24
Not the answer you are looking for? Search for more explanations.
can't solve for t b/c haven't been able to factor (-16t^2-24+80)=0. quad equation gives t= about 2.9 which doesn't make any sense b/c it isn't an option. And, check back. My v formula is v(t)=-32-24
it is wrong, it should be -32t-24
assuming that t=2.9 is right I would plug into my V(t)
Ok, must not have hit the t key hard enough but I have been using the t. I get -116.8 but the answer is -94.32.
I did the quad equation twice. But id that is the correct formula then I guess that is all I need to know. I will do it again.
This iswhat I got using quad equation. Was trying to remember what I got for t last night (not 2.9 it is 2.36). Anyway, either way the answer is not right and it is a ridiculous answer so if I did it right then I don't get how -16t^2 - 24t +80 is even factorable b/c the right answer is -94.32.
-(-24) +- (Sqrt [(-24)^2]-4(-16)(80)/2(-16)
24 +- (sqrt 576+5120)/-32
24 +- (sqrt 5696)/-32
t= 24-2.36 or 24 + 2.36
-32(21.64)-24= -716.48 or -32(26.36)-24= -867.52