A student investigates how the acceleration of a trolley of constant mass varies with the force pulling it.
The pulling force is transmitted to the trolley via a stretched string. What is the name of this force?
For a pulling force of 3.0 N3.0\text{ N}3.0 N, the student performs three runs and records the following values for the acceleration of the trolley:
2.14 m/s2,2.22 m/s2,2.10 m/s2 2.14\text{ m/s}^2, \quad 2.22\text{ m/s}^2, \quad 2.10\text{ m/s}^2 2.14 m/s2,2.22 m/s2,2.10 m/s2Calculate the uncertainty in these acceleration measurements.