## Exercise 3.6 A

Determine the acceleration in free fall.

Tip: Measure the time spent by the bubble at certain distances and move the values to the $(t^2,s)$ coordinate system. Fit a straight line to the points. What can you expect from the slope of the line?
Answer: $10\ m/s^2$

## Exercise 3.6 B

Determine the acceleration of the rolling body.

Tip: Show the motion of the body in the $(t^2{,}s)$ -coordinate system and fit a straight line to the points. What can be deduced from the slope?
Answer: $0{,}39\ \frac{m}{s^2}$

## Exercise 3.6 C

Determine the acceleration of the rolling body.

Tip: Show the motion of the body in the $(t^2{,}s)$ -coordinate system and fit a straight line to the points. What can be deduced from the slope?
Answer: $0{,}49\ \frac{m}{s^2}$