Easy One Dimensional Kinematics

[pointintime]

wait i thought i was suppose to take the two out

this is wrong

19.6 m/s^2 (11.56 s^2 + t2^2 - (6.8 s)t2) = (680 m/s)t2

 

[Doc Al]

so what do you recommend i do I did this

19.6 m/s^2 (11.56 s^2 + t2^2 - (6.8 s)t2) = (680 m/s)t2

This is still not correct. You multiplied the LHS by 4 and the RHS by 2.

 

[pointintime]

Could you please show me what to do...

sorry =[

 

[pointintime]

I do not know what to do...

 

[Doc Al]

Could you please show me what to do...

sorry =[

You have something like this:
9.8*(blah)/2 = (bleep)

To get rid of the 2, multiply both sides by 2:
9.8*(blah) = 2*(bleep) (not 19.6*(blah))

Or just use:
(9.8/2)*(blah) = (bleep)
4.9*(blah) = (bleep)

 

[pointintime]

ok i'll go at it and edit this post

(9.80 m/s^2 (11.56 s^2 + t2^2 - 2(3.4 s)t2))/2 = (340 m/s) t2
(4.90 m/s^2 (11.56 s^2 + t2^2 - (6.8 s)t2))/2 = (340 m/s) t2
56.64 m + (4.90 m/s^2)t2^2 - (33.32 m/s)t2 = (340 m/s) t2
56.64 m + (4.90 m/s^2)t2^2 - (33.32 m/s)t2 - (340 m/s) t2 = 0
(4.90 m/s^2)t2^2- (373.3 m/s)t2 + 56.64 m

 

[pointintime]

Is that correcT?

 

[Doc Al]

That's looks much better. Solve it.