There are different ways to investigate the effect of varying the force on an object. In this required practical activity, it is important to:
The diagram shows apparatus that can be used in this investigation. A constant stream of air reduces the friction between the glider and the air track.
To investigate the effect of varying the force on the acceleration of an object.
It is important to record results in a suitable table, like the one below, which shows a set of example acceleration results in m/s2:
|Force in N||Run 1||Run 2||Run 3||Mean|
Plot a line graph with acceleration on the vertical axis and force on the horizontal axis. Draw a suitable line of best fit.
Describe what the results show about the effect of increasing the force on the acceleration of the object.
Acceleration is directly proportional to the force exerted on the object. It is important to consider to what extent the results show this relationship. For example, do all the points lie on a straight line passing through the origin, or are there any anomalous points?
|Electrical appliance||Electrical fault – fire/shock||Check mains cable and plug are not broken or wiring exposed before use|
|Masses and/or glider falling to floor||Objects falling on feet – bruise/fracture||Use relatively small masses and step back after releasing glider|