Julie kicks a moose skin ball off the ground and into the air with an initial velocity of 25 feet per second. Assume the starting height of the ball is 0 feet. Approximately, how long does it take until the moose skin ball hits the ground again?

0.6 sec
0.8 sec
1.6 secs
2.8 secs
please help...

Question

Julie kicks a moose skin ball off the ground and into the air with an initial velocity of 25 feet per second. Assume the starting height of the ball is 0 feet. Approximately, how long does it take until the moose skin ball hits the ground again?
 	
	0.6 sec
	0.8 sec
	1.6 secs
	2.8 secs
please help...

cwrw238 · Answer

use the equations of motion with constant accleeration

cwrw238 · Answer

s = ut + 0.5gt^2

anonymous · Answer

what are the equations if you dont mind:)

cwrw238 · Answer

s = displacement = 0
 g = -32 ft/s62 and u = 25 ft/s

cwrw238 · Answer

0 = 25t - 16t^2
solve for t

anonymous · Answer

cwrw238 you are so wrong that newton cam back to life and died again

anonymous · Answer

@cwrw238

anonymous · Answer

so what would the answer be

anonymous · Answer

Michelle  i would like to help you but i think that the data is incomplete...

anonymous · Answer

but that is how the question is written out what am suppose to do? i could go back and reread the lesson

anonymous · Answer

yes you should you dont even know what  equations of motion are

anonymous · Answer

you see this is my third time taking this class and i really don't want to fail again.

anonymous · Answer

http://library.thinkquest.org/28388/Mechanics/Motions/Equation.htm

anonymous · Answer

Ahaha michelle take it easy!

anonymous · Answer

i think I will, look over the lesson again,but what do you guys think would be the best way to approach it.

anonymous · Answer

with love

anonymous · Answer

:)

anonymous · Answer

The problem that i am having is the fact that they didnt mention at which point in height the balls stops and starts falling back

anonymous · Answer

yeah, i guess, i could always email my teacher about it because there are alway's glitches like that happening in the tests.

jim_thompson5910 · Answer

cwrw238 already said it

solve 0 = 25t - 16t^2 for t to get your answer (it will be the root that is not 0)

anonymous · Answer

um ok, i will go back and do it that way.

anonymous · Answer

thanks for the advice everyone, you all have been great so you have a nice day

anonymous · Answer

YOU HAVE TO USE SEQENCES EVERTHING ELSE IS WRONG!!!!!!!!!!!!!!

anonymous · Answer

Good luck!

cwrw238 · Answer

16t^2 - 25 = 0
t(16t - 25) = 0
16t = 25 
f = 25/16 = 1.6