# 2D Kinematics question

1. Jan 12, 2014

### princejan7

1. The problem statement, all variables and given/known data

http://postimg.org/image/bh4tzmd4l/ [Broken]

Can someone explain to me what "acceleration of the truck relative to the crate means"?

What should I do first in trying to solve this?

Last edited by a moderator: May 6, 2017
2. Jan 12, 2014

### Andrew Mason

It means the difference between the acceleration of the truck and the acceleration of the crate. From that, I think you can figure out what you have to do in order to start.

AM

Last edited by a moderator: May 6, 2017
3. Jan 12, 2014

### princejan7

thanks, I have another question

http://postimg.org/image/81muw26tl/ [Broken]

I don't understand what the value h is in this question and how its relevant to finding the distance AB

Last edited by a moderator: May 6, 2017
4. Jan 12, 2014

### haruspex

You are to take h as the height of the bottom end of the ramp above the surface of the slope immediately below it. The slope continues down at angle beta from there.

Last edited by a moderator: May 6, 2017