The experiment goes like this:
Allow a moving cart to move from the top of an incline plane ($x_0$) downwards. The time taken will be recorded by the picket fence (those things you see wired up). Distance ($D$) is reduced by 10cm each time. And a set of recordings are recored as follows:
Does the recording seem logical?
- As $D$ decreases, $v$ increases? Why, I thought $v$ should reduce as there will be less effect from gravity?
- As $D$ decreases the standard error decreases. It kind of makes sense as the time interval will be smaller and thus less chance of error. However, I would think if the $D$ is too small, the cart may not have stabalized or something? But that doesn't sound scientific.
- Is my calculation of standard error right? Or should it be standard deviation here? When do I use which?