can some1 help me with this problem or gieve me at least a place to start?

Question

i dont know how to do this a need some help starting it

3) an objects is moving initially in the x direction at 4.5 m/s^2 when an acceleration is applied in the y direction for a period of 18 seconds. if the object moves equal distances in the x and y directions during this time, what is the magnitude of the acc?

Answer 1

Hi,
There's some ambiguity about how this problem is worded. But I'll give you some help the way I interpret it, and maybe you can use that.

First, if the objects move equal distance in the x- and y-direction in the same time; then the accelerations are the same. So, the acceleration in the y direction is 4.5 m/s² also. If you need some math to prove that, you can do this:
(Where there are two letters, such as dx or dy, the second letter should be a subscript. Sorry, I don't know how to do subscripts on this word processor.)
dx = dy (Where dx = distance in the x-direction and dy the distance in the y direction.)
(ax)t² =(ay)t²
(4.5)18² =(ay)18²
4.5=ay (Divide by 18².)

Now, it’s not totally clear if they want the resultant acceleration, but I’ll do it anyway. We can find that using the Pythagorean Theorem.

ar = √[(ax)²+(ay)²]
= √[(4.5)²+(4.5)²]
=√[(4.5)²+(4.5)²]
=√[(20.25)+(20.25)]
=√[(40.5]
=6.36
I’m a little suspicious there may have been something unintentionally omitted from this problem. If so, repost with additional information.


Hope this helps some.
FE

Answer 2

who makes up these question i'm all for brain power but damn....y can't kindergarten kids ask question?.......but srry can't help u there