Originally Posted by

**shadow6** Right now I'm doing a lab report on the motion of a cart moving down an incline. So far, I've got my purpose, materials, and procedure written down. I'm currently doing the response questions. There are 10 of them, and I've got 6 so far. Two of them I'll be fine with, but one of them in particular right now is puzzling me.

The question I need help on says: Sketch the shapes of the position-time, velocity-time, and acceleration time graphs for the cart rolling down the ramp.

A previous procedure says: Plot a graph of velocity against time for the cart by plotting the average velocities at half-time intervals (0.05s, 0.15s, etc).

I graphed my results and got the following (see attached). My question is, am I supposed to use half-time intervals or normal-time intervals for the three graphs? What’s the purpose of half time? It just doesn’t make sense to ask for the same graph twice.