2b. [8 marks] Another student suggests that the relationship between t and h is of the form
t = k
where k is a constant.
To test whether or not the data support this relationship, a graph of t2 against 1/h is plotted
as shown below.
The best-fit line takes into account the uncertainties for all data points.

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)