The mass of the wagon, the value of the hanging mass and the coefficient of friction (within certain limits) can be changed.
For one measurement you have to adjust the measuring distance (from the initial position to the light barrier LB, accuracy 5 mm) with pressed mouse button and to read the corresponding time (digital display, accuracy 1 ms). During the movement a red point in the t-s-diagram (time - displacement) indicates the present time and the covered distance. As soon as the measurement of time is finished, the pair of measured values will be marked on the diagram. After a mouse click on the "Record data" button the data will be registered on the list. A series of measurements with the same parameters cannot contain more than 10 measurements.
Application of Newton's second law:
a ... acceleration m ... hanging mass g ... gravitational acceleration m ... coefficient of friction M ... mass of the wagon
Motion with constant acceleration and initial speed 0:
s ... displacement a ... acceleration t ... time