Question

Help, Rational Equations?

Answer 1

The formula t = sqrt 2s/g gives the time in seconds for an object, initially at rest, to fall s feet.

a. Solve the formula for s. (I got gt^2 over 2 equals s as my answer.)
b. If g = 32.2, find the distance an object falls in the first 5 seconds.
c. Find the distance an object falls in the first 10 seconds.

Thank you!

Answer 2

It is C

Answer 3

A, b, and c are parts of a problem, not options.

Answer 4

ohhh ok kcool

Answer 5

a is right.
b. plug in what you have then solve! you already know your equation is...
\[s=\frac{ (g t)^{2} }{ 2 }\]

Answer 6

@jeremyggg is right :)

Answer 7

g = 32.2 and t = 5!

Answer 8

What does t and s represent?

Answer 9

you typed out the last part of the question "to fall s feet" so, lets work through this question where you do the work and i guide so you can figure out how to set these up!

Answer 10

Okay, then.

Answer 11

with the part A. that you did, you set up a way to solve all of your problems just by plugging in. now that we know that s is a distance, and for b it is giving you g=32.2 and a time = 5 try and set the new equation up!

Answer 12

I'm pretty sure now that I just forgot about what I typed earlier and thought that s was seconds.

But this is what I did:

(32.2)5^2/2 = s
32.2 x 25 / 2 = s
805/2 = s
=403.5 ft.

Answer 13

*ahem, I meant 402.5 ft. Sorry.

Answer 14

this looks right! it is hard to tell what you have in your sqrt though. usually whatever belongs in there is in () like sqrt(2)s/g compared to sqrt(s2/g). but yeah, i would say that is right!

Answer 15

Okay, thanks :) I finished part c. I got 1610. Like this:

(32.2) x 10^2 / 2 =s
3220/2 - s
=1610 ft.

Would that be right?

Answer 16

yep! good job! using s as the variable for height when there is also time in seconds was kinda mean of whoever created that problem!

Answer 17

It was kind of mean, but it was partly my fault too for forgetting about it in the first place, lol. Thank you very much for your help :) Somehow, I feel like singing at late night is going to be unsettling to my neighbors.

Answer 18

haha I know the feeling very well! There is nothing quite like FINALLY understanding math!

Answer 19

Disturbing mental image of a bunch of people holding up a giant "I HAS FINALLY PASSED MATH!1!!!11!!" sign with a bonfire and a disco...o_o

Well, again, thanks a lot, and I hope I didn't waste your time :) Good night!

Answer 20

goodnight! ask for help anytime!