Homework Help: Acceleration due to gravity hw problem

I'm having difficulty with these two problems:

1. A mass is moving towards a massive crater (along the +x direction) on the Moon with an initial velocity of 636.8 cm/s. How far will the object fall in the first 1.1 seconds.

2. An object initially displaced 56.8 m (along the horizontal x direction) has in initial velocity downward (along the -y direction) of 152.4 cm/s. If this object is on Neptune, how far (in meters) will it fall after 22.5 seconds?

I'm not looking for the answers, I just need someone to point me in the right direction. I have attempted solving several different ways to no avail. The acceleration due to gravity on the Moon is 1.6 m/s2 and 14.07 m/s2 on Neptune. Thanks in advance!

JB Gibson

 

I'm not able to visualize the concept right now. I realize the problems are dealing with 2-dimensional application, but I'm puzzled. I tried applied the formulas:

y=yo+vot+1/2gt^2
y=1/2gt^2
y=(vo sin)t-1/2gt^2

Let's see....my initial velocity in the y-position is 0 and I don't have any initial position. Like I mentioned, I just need someone to point me in the right direction. It's been a while since I had a Physics class. TIA!

JB Gibson

 

If a=-g=-1.6m/s^2 on the moon, is the solution to problem #1:

y=-1/2gt^2=-96.8cm?

I submitted this as my answer, but it is incorrect. I don't know anymore; maybe I should just give up.

 

Any help is greatly appreciated.