2. Data Analysis Problem: A cart (2.0 kg) is released from rest at the top of a 2.00-m-long plank.

The cart rolls down the ramp and hits a spring. The angle of the ramp is varied and the

maximum spring compression is recorded for each angle. The data is presented below. What

is the spring constant?

the file included the question, professor need us to find the coefficient of friction, and find

uncertainty in the spring constant, and also evaluate some data that is deviated from the fitted linear

line.

professor said, "the intercept primarily gives you the coefficient of friction."

I dont know what he means

he also said, "If you include friction and use the small angle approximation, you should find that

x^2(6) is a linear function. The intercept is determined (in part) by the coefficient of friction. The

slope is determined (in part) by the spring constant but the friction has no impact on the slope."

please show me that procedure in the answer