Keeping the inclination of the ramp constant, give the phone an initial velocity that is

uphill

During this motion select the data as it travels uphill and downhill separately and fill out the

table below, by doing a few trials of this setup (the uphill motion is usually more wobbly and

it is hard to see the turning point, try it once).

Acceleration (uphill)	Acceleration (downhill)

B. Evaluate

Q1) Is the uphill acceleration of your cart the same as the downhill acceleration of your cart?

Q2)

If there is a difference, what is a possible source for that difference?